Não informado. (1926). Collected papers. University of Puerto Rico, School of Tropical Medicine.
Chicago-referens (17:e uppl.)Não informado. Collected Papers. San Juan: University of Puerto Rico, School of Tropical Medicine, 1926.
MLA-referens (8:e uppl.)Não informado. Collected Papers. University of Puerto Rico, School of Tropical Medicine, 1926.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.