Cita APA (7a ed.)

American Geographical Society of New York. (1949). Putumayo-Içá (Edición provisional.). Army Map Service.

Cita Chicago Style (17a ed.)

American Geographical Society of New York. Putumayo-Içá. Edición provisional. s.l.: Army Map Service, 1949.

Cita MLA (8a ed.)

American Geographical Society of New York. Putumayo-Içá. Edición provisional. Army Map Service, 1949.