Cita APA (7a ed.)

American Geographical Society of New York. (1940). Rio Apa. A. Hoen and Company.

Cita Chicago Style (17a ed.)

American Geographical Society of New York. Rio Apa. Baltimore: A. Hoen and Company, 1940.

Cita MLA (8a ed.)

American Geographical Society of New York. Rio Apa. A. Hoen and Company, 1940.