Cita APA (7th ed.)

Langley, L. D. (1989). America and the Americas: The United States in the western hemisphere. University of Georgia.

Cita Chicago (17th ed.)

Langley, Lester D. America and the Americas: The United States in the Western Hemisphere. Atlanta: University of Georgia, 1989.

Cita MLA (9th ed.)

Langley, Lester D. America and the Americas: The United States in the Western Hemisphere. University of Georgia, 1989.