@book{Kirby2011,
author = {Kirby, D.},
title= {Sex education: Access and impact on sexual behaviour of young people},
year = {2011},
URL = {http://www.un.org/esa/population/meetings/egm-adolescents/p07_kirby.pdf},
address = {New York},
publisher = {Expert Group Meeting on Adolescents, Youth, and Development; United Nations, Population Division, Department of Economic and Social Affairs},
}