APA (7th ed.) Zitazioa

WORTMAN, S. (1978). To feed this World: The challenge and the strategy. The Johns Hopkins University.

Chicago Style (17th ed.) Zitazioa

WORTMAN, Sterling. To Feed This World: The Challenge and the Strategy. Baltimore: The Johns Hopkins University, 1978.

MLA (9th ed.) Zitazioa

WORTMAN, Sterling. To Feed This World: The Challenge and the Strategy. The Johns Hopkins University, 1978.