Παραπομπή APA

Zimmer, G. F. (2000). The biological farmer: A complete guide to the sustainable & profitable biological system of farming. Austin, TX.: Acres U.S.A..

Παραπομπή Chicago Style

Zimmer, Gary F. The Biological Farmer: A Complete Guide to the Sustainable & Profitable Biological System of Farming. Austin, TX.: Acres U.S.A., 2000.

Παραπομπή MLA

Zimmer, Gary F. The Biological Farmer: A Complete Guide to the Sustainable & Profitable Biological System of Farming. Austin, TX.: Acres U.S.A., 2000.

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