"Video Phone – EP di Beyoncé" (in Italian). iTunes Store (Italy). Apple Inc. 23 November 2009. Retrieved September 18, 2014.
archive.today
Eskridge, Sonya (August 13, 2009). "Beyoncé's 'poison' leaked". Sister 2 Sister. Jamie Foster Brown. Archived from the original on June 20, 2013. Retrieved June 12, 2013.
Eskridge, Sonya (August 13, 2009). "Beyoncé's 'poison' leaked". Sister 2 Sister. Jamie Foster Brown. Archived from the original on June 20, 2013. Retrieved June 12, 2013.
"Korean International Singles Chart for Week Ending February 7, 2010"(The URL will open up the South Korea national singles chart. To view international, click the right hand box out of three above the orange 'number one' position. Then above the chart table on the right, select 2010 instead of 2013 and then select February 1 to 7). Gaon Chart. February 7, 2010. Retrieved June 27, 2013.
