Cita APA (7th ed.)

Harlow, R. V. (1955). The United States: From wilderness to world power. Cape.

Cita Chicago (17th ed.)

Harlow, Ralph Volney. The United States: From Wilderness to World Power. London: Cape, 1955.

Cita MLA (8th ed.)

Harlow, Ralph Volney. The United States: From Wilderness to World Power. Cape, 1955.