Παραπομπή APA

Soule, G. (1967). Planning U.S.A. Scientific Book Agency.

Παραπομπή Chicago Style

Soule, George. Planning U.S.A. Calcutta: Scientific Book Agency, 1967.

Παραπομπή MLA

Soule, George. Planning U.S.A. Scientific Book Agency, 1967.