Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (8a ed.)

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