Não informado. Porto Rico Health Review. Department of Health of Puerto Rico.
Chicago-Zitierstil (17. Ausg.)Não informado. Porto Rico Health Review. San Juan: Department of Health of Puerto Rico.
MLA-Zitierstil (8. Ausg.)Não informado. Porto Rico Health Review. Department of Health of Puerto Rico.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.