Não informado. (2008). Report of the Commissioner of Health of Porto Rico. Bureau of Insular Affairs.
Chicago-Zitierstil (17. Ausg.)Não informado. Report of the Commissioner of Health of Porto Rico. Washington: Bureau of Insular Affairs, 2008.
MLA-Zitierstil (8. Ausg.)Não informado. Report of the Commissioner of Health of Porto Rico. Bureau of Insular Affairs, 2008.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.