"ČNS IFPI". Hitparáda – Digital Top 100 Oficiální (in Czech). IFPI Czech Republic. Archived from the original on July 5, 2006. Retrieved January 18, 2016. Note: insert 201534 into search.
"Czech Albums – Top 100". ČNS IFPI. Note: On the chart page, select 43.Týden 2015 on the field besides the words "CZ – ALBUMS – TOP 100" to retrieve the correct chart.
"Demi Lovato "Stone Cold" Sheet Music". Musicnotes.com. Kobalt Music Publishing America, Inc. October 16, 2015. Archived from the original on November 18, 2016. Retrieved February 19, 2017.
"Demi Lovato "Stone Cold" Sheet Music". Musicnotes.com. Kobalt Music Publishing America, Inc. October 16, 2015. Archived from the original on November 18, 2016. Retrieved February 19, 2017.
"ČNS IFPI". Hitparáda – Digital Top 100 Oficiální (in Czech). IFPI Czech Republic. Archived from the original on July 5, 2006. Retrieved January 18, 2016. Note: insert 201534 into search.