Cita APA (7a ed.)

Field, R. M. (1932). Yellowstone - Beartooth - Big Horn region. U.S. Govt. Print. Off..

Cita Chicago Style (17a ed.)

Field, Richard M. Yellowstone - Beartooth - Big Horn Region. Washington: U.S. Govt. Print. Off., 1932.

Cita MLA (8a ed.)

Field, Richard M. Yellowstone - Beartooth - Big Horn Region. U.S. Govt. Print. Off., 1932.

Precaución: Estas citas no son 100% exactas.