Não informado. (1926). Collected papers. University of Puerto Rico, School of Tropical Medicine.
Chicago-viite (17. p.)Não informado. Collected Papers. San Juan: University of Puerto Rico, School of Tropical Medicine, 1926.
MLA-viite (8. p.)Não informado. Collected Papers. University of Puerto Rico, School of Tropical Medicine, 1926.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.