Cita APA (7th ed.)
Wortman, S. (1978). To feed this world: The challenge and the strategy. Johns Hopkins U. P..
Cita Chicago (17th ed.)
Wortman, Sterling. To Feed This World: The Challenge and the Strategy. Baltimore: Johns Hopkins U. P., 1978.
Cita MLA (9th ed.)
Wortman, Sterling. To Feed This World: The Challenge and the Strategy. Johns Hopkins U. P., 1978.
Atenció: Aquestes cites poden no estar 100% correctes.