Não informado. (2018). Reports and Collected Studies. Institute of Tropical Medicine and Hygiene of Porto Rico.
Chicago-referens (17:e uppl.)Não informado. Reports and Collected Studies. San Juan: Institute of Tropical Medicine and Hygiene of Porto Rico, 2018.
MLA-referens (8:e uppl.)Não informado. Reports and Collected Studies. Institute of Tropical Medicine and Hygiene of Porto Rico, 2018.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.