Dyfyniad APA

ebrary, Inc, Tweeten, L. G., & Thompson, S. R. (2002). Agricultural policy for the 21st century. Iowa State Press.

Dyfyniad Arddull Chicago

ebrary, Inc, Luther G. Tweeten, and Stanley R. Thompson. Agricultural Policy for the 21st Century. Ames: Iowa State Press, 2002.

Dyfyniad MLA

ebrary, Inc, et al. Agricultural Policy for the 21st Century. Iowa State Press, 2002.

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