Παραπομπή APA

Gardiner, P. (1959). Theories of history: Readings from classical and contemporary sources. Free Press.

Παραπομπή Chicago Style

Gardiner, Patrick. Theories of History: Readings from Classical and Contemporary Sources. New York: Free Press, 1959.

Παραπομπή MLA

Gardiner, Patrick. Theories of History: Readings from Classical and Contemporary Sources. Free Press, 1959.