Merkoša sitáhtat

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