Cita APA (7a ed.)

Walker, E. P. (1943). Alaska: America's continental frontier outpost. Smithsonian Institution.

Cita Chicago Style (17a ed.)

Walker, Ernest P. Alaska: America's Continental Frontier Outpost. Washington: Smithsonian Institution, 1943.

Cita MLA (9a ed.)

Walker, Ernest P. Alaska: America's Continental Frontier Outpost. Smithsonian Institution, 1943.