Gaya APA

Ruppel, F, J. (1991). National and regional self-sufficiency goals : implications for international agriculture / editor, Fred J. Ruppel, Earl D. Kellog . : L. Rienner.

Gaya MLA

Ruppel, Fred, J.. "National and regional self-sufficiency goals : implications for international agriculture / editor, Fred J. Ruppel, Earl D. Kellog". : L. Rienner, 1991. Textbook.