Παραπομπή APA
Wortman, S., & Cummings, R. W. (1978). To feed this world: The challenge and the strategy. Baltimore: Johns Hopkins University Press.
Παραπομπή Chicago StyleWortman, Sterling, and Ralph Waldo Cummings. To Feed This World: The Challenge and the Strategy. Baltimore: Johns Hopkins University Press, 1978.
Παραπομπή MLAWortman, Sterling, and Ralph Waldo Cummings. To Feed This World: The Challenge and the Strategy. Baltimore: Johns Hopkins University Press, 1978.
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