Autor:	Macdowall, Wendy, Wellings, Kaye, Mercer, Catherine H., Nanchahal, Kiran, Copas, Andrew J., McManus, Sally, Fenton, Kevin A., Erens, Bob, Johnson, Anne M.
Zdroj:	Health Education & Behavior, 2006 Dec 01. 33(6), 802-811.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/45056401 Zobrazit plný text záznamu