Maragay, F. V. (2009). Drug companies defend 'voluntary compliance'. Manila Standard Today.
Chicago-referens (17:e uppl.)Maragay, Fel V. "Drug Companies Defend 'Voluntary Compliance'." Manila Standard Today 2009.
MLA-referens (9:e uppl.)Maragay, Fel V. "Drug Companies Defend 'Voluntary Compliance'." Manila Standard Today, 2009.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.