Dyfyniad APA

National Research Council (U.S.). Committee on the Role of Alternative Farming Methods in Modern Production Agriculture. (1989). Alternative agriculture. National Academy Press.

Dyfyniad Arddull Chicago

National Research Council (U.S.). Committee on the Role of Alternative Farming Methods in Modern Production Agriculture. Alternative Agriculture. Washington, D.C.: National Academy Press, 1989.

Dyfyniad MLA

National Research Council (U.S.). Committee on the Role of Alternative Farming Methods in Modern Production Agriculture. Alternative Agriculture. National Academy Press, 1989.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.