Didsaya Sirikittikorn. 2010. Emergency contraceptive pills : knowledge and attitude among undergraduate students in a college in Bangkok. Bangkok:Thammasat University;
Didsaya Sirikittikorn. (2010) Emergency contraceptive pills : knowledge and attitude among undergraduate students in a college in Bangkok (รายงานผลงานวิจัย). Thammasat University:Bangkok.
Didsaya Sirikittikorn. Emergency contraceptive pills : knowledge and attitude among undergraduate students in a college in Bangkok. Bangkok:Thammasat University, 2010.
Didsaya Sirikittikorn. (2010) Emergency contraceptive pills : knowledge and attitude among undergraduate students in a college in Bangkok (รายงานผลงานวิจัย). Thammasat University:Bangkok.