Cita APA (7a ed.)

Ferreyra, R. (1953). A Revision of the Colombian Species of Monnina (Polygalaceae). Smithsonian Institution.

Cita Chicago Style (17a ed.)

Ferreyra, Ramón. A Revision of the Colombian Species of Monnina (Polygalaceae). Washington, D.C: Smithsonian Institution, 1953.

Cita MLA (9a ed.)

Ferreyra, Ramón. A Revision of the Colombian Species of Monnina (Polygalaceae). Smithsonian Institution, 1953.