I Was a Fool (English Wikipedia)

Vallejo, Carolyn (January 2013). "ATP! Album Review: Tegan and Sara – Heartthrob". Alter the Press! SpinMedia. Retrieved November 17, 2014.
Ableson, Joe (September 2012). "Tegan and Sara Perform Three New Songs Live In Vancouver". Alter The Press! SpinMedia. Retrieved November 22, 2014.

apple.com

itunes.apple.com

"I Was a Fool Remixed". iTunes Store (US). Apple Inc. September 30, 2014. Retrieved November 28, 2014.
"I Was a Fool – Single by Tegan and Sara (IE)". iTunes Store (IE). Apple. June 7, 2013. Retrieved July 9, 2013.
"I Was a Fool – Single by Tegan and Sara (UK)". iTunes Store (UK). Apple. June 7, 2013. Retrieved July 9, 2013.

archive.today

Beringer, Drew. "Tegan and Sara – Heartthrob – Album Review". AbsolutePunk. Buzz Media. Archived from the original on February 21, 2013. Retrieved November 17, 2014.

avclub.com

Zaleski, Annie (January 29, 2013). "Tegan And Sara: Heartthrob". The A.V. Club. The Onion. Retrieved November 17, 2014.

billboard.com

Lipshutz, Jason (January 29, 2013). "Tegan and Sara, 'Heartthrob': Track-By-Track Review". Billboard. Prometheus Global Media. Retrieved November 17, 2014.
"Billboard Canadian Hot 100: May 18, 2013". Billboard. Prometheus Global Media. Archived from the original on July 3, 2015. Retrieved November 19, 2014.
"Billboard Canadian Hot 100: July 13, 2013". Billboard. Prometheus Global Media. Retrieved February 13, 2017.
"Tegan and Sara Chart History (Canadian Hot 100)". Billboard. Retrieved July 17, 2014.
"Tegan and Sara chart history: Adult Pop Songs". Billboard. Prometheus Global Media. Archived from the original on July 3, 2015. Retrieved July 12, 2014.
"Tegan & Sara perform "I Was a Fool" Live at Billboard Women In Music 2013". Billboard. Prometheus Global Media. January 17, 2014. Retrieved November 22, 2014.
"Tegan and Sara Chart History (Canada AC)". Billboard. Retrieved 22 February 2015.
"Tegan and Sara Chart History (Canada CHR/Top 40)". Billboard. Retrieved 22 February 2015.
"Tegan and Sara Chart History (Canada Hot AC)". Billboard. Retrieved 22 February 2015.
"Canadian Hot 100: 2013". Billboard. Prometheus Global Media. January 2, 2013. Retrieved November 22, 2014.

bridgitmendler.com.br

"Mendler on MTV Live UK". BridgitMendler.com. Archived from the original on November 29, 2014. Retrieved July 28, 2013.

bringthenoiseuk.com

"Bridgit Mendler Covers I Was A Fool". Bring the Noite UK. Archived from the original on October 7, 2013. Retrieved July 28, 2013.

cbc.ca

music.cbc.ca

Morey, Pete. "The Radio 2 Top 20: Tegan and Sara are first twins to top the chart)". CBC Music. Canadian Broadcasting Corporation. Archived from the original on March 1, 2016. Retrieved May 24, 2013.

consequenceofsound.net

H. Grant, Sarah (January 30, 2013). "Tegan and Sara – Heartthrob". Consequence of Sound. Retrieved November 17, 2014.

coupdemainmagazine.com

"BRIDGIT MENDLER covering Tegan and Sara's 'I Was A Fool'". Coup de Main Magazine. February 25, 2013. Retrieved July 28, 2013.

digitalspy.com

Copsey, Robert (February 13, 2013). "Tegan and Sara song 'I Was A Fool' inspired by Rihanna". Digital Spy. Hearst Corporation. Retrieved November 19, 2014.

dis411.net

"Bridgit Mendler's Acoustic Version Of "I Was A Fool"". Dis411. Archived from the original on November 29, 2014. Retrieved July 28, 2013.

drownedinsound.com

Burrows, Marc (February 6, 2013). "Album Reviews: Tegan & Sara – Heartthrob". Drowned in Sound. Silentway. Archived from the original on December 13, 2013. Retrieved November 17, 2014.

fanpop.com

"Bridgit Mendler – I Was A Fool (Acoustic Cover)". Fanpop. Retrieved July 28, 2013.

idolator.com

Williott, Carl (January 14, 2013). "Tegan And Sara's "I Was A Fool": Listen". Idolator. Spin Media. Retrieved November 17, 2014.
Sears, Stephen (January 29, 2013). "Tegan And Sara's 'Heartthrob': Album Review". Idolator. SpinMedia. Retrieved November 22, 2014.

itemvn.com

"Bridgit Mendler – I Was A Fool (Single)". Itemvn. Archived from the original on June 22, 2013. Retrieved July 28, 2013.

mtvhive.com

Solomon, Dan (October 16, 2012). "Tegan and Sara Went 'Crazy' With the Hooks on 'Heartthrob' Tegan and Sara". MTV Hive. Viacom. Archived from the original on July 17, 2014. Retrieved November 19, 2014.

musiccanada.com

"Canadian single certifications – Tegan and Sara – I Was a Fool". Music Canada.

musicnotes.com

"Tegan and Sara – I Was a Fool (Digital Download)". Musicnotes.com. Naked in a Snowsuit Publishing. September 24, 2013. Retrieved November 17, 2014.

ontheteenbeat.com

"Bridgit Mendler Covers Tegan And Sara!". ontheteenbeat. Archived from the original on November 29, 2014. Retrieved July 28, 2013.

pastemagazine.com

Weiss, Dan (January 29, 2013). "Tegan and Sara: Heartthrob". Paste. Wolfgang's Vault. Retrieved November 17, 2014.

pitchfork.com

Snapes, Laura (January 28, 2013). "Tegan and Sara: Heartthrob". Pitchfork Media. Retrieved November 17, 2014.

spin.com

Martins, Chris (November 17, 2014). "Hear Tegan and Sara's Kate Bush-Style Ballad 'I Was a Fool'". Spin. SpinMedia. Retrieved November 17, 2014.
McGovern, Kyle (February 1, 2013). "Watch Tegan and Sara Bring 'Heartthrob' Gems to 'Kimmel'". Spin. SpinMedia. Retrieved November 22, 2014.

stereogum.com

Nelson, Michael (April 18, 2013). "Tegan And Sara – "I Was A Fool" (Matthew Dear Remix)". Stereogum. SpinMedia. Retrieved November 18, 2014.

sugarscape.com

"Bridgit Mendler covers Tegan & Sara's I Was A Fool. Amazingly". 5thingsaboutpop. Archived from the original on November 29, 2014. Retrieved July 28, 2013.

teganandsara.com

Quin, Tegan (November 30, 2011). "Post Turkey Coma Dispatch". teganandsara.com. Archived from the original on July 2, 2014. Retrieved August 27, 2014.
Quin (April 15, 2013). "I Was A Fool Tegan and Sara". Tegan and Sara. Retrieved August 12, 2013.
"Indaba 'I Was A Fool' Remix Contest". teganandsara.com. May 21, 2014. Retrieved November 18, 2014.

undertheradarmag.com

Trunick, Austin (January 22, 2013). "Track-by-Track: Tegan and Sara's Heartthrob Part Two". Under the Radar. Archived from the original on May 30, 2013. Retrieved November 28, 2014.

web.archive.org

Morey, Pete. "The Radio 2 Top 20: Tegan and Sara are first twins to top the chart)". CBC Music. Canadian Broadcasting Corporation. Archived from the original on March 1, 2016. Retrieved May 24, 2013.
Quin, Tegan (November 30, 2011). "Post Turkey Coma Dispatch". teganandsara.com. Archived from the original on July 2, 2014. Retrieved August 27, 2014.
Trunick, Austin (January 22, 2013). "Track-by-Track: Tegan and Sara's Heartthrob Part Two". Under the Radar. Archived from the original on May 30, 2013. Retrieved November 28, 2014.
"Tegan and Sara / Heartthrob Press Kit" (PDF). Warner Bros. Records. Archived from the original (PDF) on November 4, 2013. Retrieved August 27, 2014.
Solomon, Dan (October 16, 2012). "Tegan and Sara Went 'Crazy' With the Hooks on 'Heartthrob' Tegan and Sara". MTV Hive. Viacom. Archived from the original on July 17, 2014. Retrieved November 19, 2014.
Burrows, Marc (February 6, 2013). "Album Reviews: Tegan & Sara – Heartthrob". Drowned in Sound. Silentway. Archived from the original on December 13, 2013. Retrieved November 17, 2014.
"Billboard Canadian Hot 100: May 18, 2013". Billboard. Prometheus Global Media. Archived from the original on July 3, 2015. Retrieved November 19, 2014.
"Tegan and Sara chart history: Adult Pop Songs". Billboard. Prometheus Global Media. Archived from the original on July 3, 2015. Retrieved July 12, 2014.
"Bridgit Mendler – I Was A Fool (Single)". Itemvn. Archived from the original on June 22, 2013. Retrieved July 28, 2013.
"Bridgit Mendler Covers I Was A Fool". Bring the Noite UK. Archived from the original on October 7, 2013. Retrieved July 28, 2013.
"Bridgit Mendler's Acoustic Version Of "I Was A Fool"". Dis411. Archived from the original on November 29, 2014. Retrieved July 28, 2013.
"5 Things About Bridgit Mendler". Sugar Space. Archived from the original on August 3, 2013. Retrieved July 28, 2013.
"Bridgit Mendler covers Tegan & Sara's I Was A Fool. Amazingly". 5thingsaboutpop. Archived from the original on November 29, 2014. Retrieved July 28, 2013.
"Bridgit Mendler Covers Tegan And Sara!". ontheteenbeat. Archived from the original on November 29, 2014. Retrieved July 28, 2013.
"Mendler on MTV Live UK". BridgitMendler.com. Archived from the original on November 29, 2014. Retrieved July 28, 2013.
"Remix Tegan and Sara's "I Was a Fool" to win $750, be officially released, and be featured". Indaba Music. Archived from the original on December 5, 2014. Retrieved November 28, 2014.{{cite web}}: CS1 maint: unfit URL (link)

wmg-is.com

media.wmg-is.com

"Tegan and Sara / Heartthrob Press Kit" (PDF). Warner Bros. Records. Archived from the original (PDF) on November 4, 2013. Retrieved August 27, 2014.

youtube.com

"Tegan & Sara, I Was A Fool – Song Stories". NME TV. June 13, 2013. Retrieved July 30, 2013.
"Tegan & Sara "I Was A Fool" – 'Heartthrob': Track by Track". The Warner Sound. February 15, 2013. Retrieved July 30, 2013.
"Tegan + Sara – I Was A Fool (Live for Virgin Red Room)". Virgin Group. February 28, 2013. Retrieved November 22, 2014.

zobbel.de

"CLUK Update 22.06.2013 (wk24)". UK Charts. Retrieved May 13, 2013.