Παραπομπή APA

(1961). Seeds: The yearbook of griculture 1961. Washington: The United State Department of Agriculture.

Παραπομπή Chicago Style

Seeds: The Yearbook of Griculture 1961. Washington: The United State Department of Agriculture, 1961.

Παραπομπή MLA

Seeds: The Yearbook of Griculture 1961. Washington: The United State Department of Agriculture, 1961.

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