Tài liệu tham khảo WikiPedia: Gái gọi http://www.nbcnews.com/id/10879309 http://www.nbcnews.com/id/10896432 http://nymag.com/nymetro/nightlife/sex/features/12... http://news.bbc.co.uk/1/hi/magazine/7819984.stm https://mobile.nytimes.com/2009/04/19/fashion/19cr... https://www.nytimes.com/2008/06/17/us/17erotic.htm... https://www.salon.com/2014/02/24/when_porn_stars_b... https://www.theguardian.com/society/2015/feb/27/mo... https://www.theguardian.com/world/2000/may/11/gend...
