Koski, Genevieve (November 20, 2012). "Rihanna: Unapologetic". The A.V. Club. Chicago: The Onion, Inc. Archived from the original on November 9, 2013. Retrieved November 20, 2012.
"ČNS IFPI" (in Czech). Hitparáda – Radio Top 100 Oficiální. IFPI Czech Republic. Note: Select 49. týden 2013 in the date selector. Retrieved May 20, 2013.
Koski, Genevieve (November 20, 2012). "Rihanna: Unapologetic". The A.V. Club. Chicago: The Onion, Inc. Archived from the original on November 9, 2013. Retrieved November 20, 2012.