Não informado. (2007). Report of the director. University of Puerto Rico, School of Tropical Medicine.
Citace podle Chicago (17th ed.)Não informado. Report of the Director. San Juan: University of Puerto Rico, School of Tropical Medicine, 2007.
Citace podle MLA (8th ed.)Não informado. Report of the Director. University of Puerto Rico, School of Tropical Medicine, 2007.
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