APA

Puerto Rico, . (1960). Graphs on health progress in Puerto Rico during the present century. San Juan, P. R: [Section of Biostatistics. Dept.of Preventine medicine... University of Puerto Rico].

Chicago

Puerto Rico, . 1960. Graphs on health progress in Puerto Rico during the present century. San Juan, P. R: [Section of Biostatistics. Dept.of Preventine medicine... University of Puerto Rico].

Harvard

Puerto Rico, . (1960). Graphs on health progress in Puerto Rico during the present century. San Juan, P. R: [Section of Biostatistics. Dept.of Preventine medicine... University of Puerto Rico].

MLA

Puerto Rico, . Graphs on health progress in Puerto Rico during the present century. San Juan, P. R: [Section of Biostatistics. Dept.of Preventine medicine... University of Puerto Rico]. 1960.