"ČNS IFPI" (in Czech). Hitparáda – Radio Top 100 Oficiální. IFPI Czech Republic. Note: Change the chart to CZ – RADIO – TOP 100 and insert 20081 into search.
hitparadask.ifpicr.cz
"ČNS IFPI" (in Slovak). Hitparáda – Radio Top 100 Oficiálna. IFPI Czech Republic. Note: insert 200743 into search.
"Årslista Singlar - År 2007". Sverigetopplistan (in Swedish). Gramophone Suppliers Association. Archived from the original on May 31, 2014. Retrieved June 24, 2016.
"Årslista Singlar - År 2007". Sverigetopplistan (in Swedish). Gramophone Suppliers Association. Archived from the original on May 31, 2014. Retrieved June 24, 2016.