"AltPorn: AltPorn Genre History Timeline (part 1) by Beeker the StatsNrrd, Altporn.net, April 28, 2007.
اطلع عليه بتاريخ 29 فبراير 2012.  "AltPorn: AltPorn Genre History Timeline (part 1) by Beeker the StatsNrrd, Altporn.net, April 28, 2007.