Cita APA (7a ed.)

Great Northern Railway Company (U.S.). (1921). Zone of plenty: Minnesota, North Dakota, Montana, Washington, Oregon, Idaho. Great Northern Railway.

Cita Chicago Style (17a ed.)

Great Northern Railway Company (U.S.). Zone of Plenty: Minnesota, North Dakota, Montana, Washington, Oregon, Idaho. [Saint Paul, Minn.]: Great Northern Railway, 1921.

Cita MLA (8a ed.)

Great Northern Railway Company (U.S.). Zone of Plenty: Minnesota, North Dakota, Montana, Washington, Oregon, Idaho. Great Northern Railway, 1921.

Precaución: Estas citas no son 100% exactas.