Não informado. Porto Rico Health Review. Department of Health of Puerto Rico.
Chicago-referens (17:e uppl.)Não informado. Porto Rico Health Review. San Juan: Department of Health of Puerto Rico.
MLA-referens (8:e uppl.)Não informado. Porto Rico Health Review. Department of Health of Puerto Rico.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.