APA (7th ed.) Zitazioa
Wortman, S. (1978). To feed this world: The challenge and the strategy. Johns Hopkins U. P..
Chicago Style (17th ed.) Zitazioa
Wortman, Sterling. To Feed This World: The Challenge and the Strategy. Baltimore: Johns Hopkins U. P., 1978.
MLA (9th ed.) Zitazioa
Wortman, Sterling. To Feed This World: The Challenge and the Strategy. Johns Hopkins U. P., 1978.
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