Cita APA (7a ed.)

Tryon, R. M. The american Nation. Yesterday and Today. Ginn.

Cita Chicago Style (17a ed.)

Tryon, Rolla M. The American Nation. Yesterday and Today. Boston: Ginn.

Cita MLA (9a ed.)

Tryon, Rolla M. The American Nation. Yesterday and Today. Ginn.