Dyfyniad APA

Goodwin, J. . W., & Drummond, . H. E. (1982). Agricultural economics/2nd ed. Reston Publishing Company.

Dyfyniad Arddull Chicago

Goodwin, John W., and H. Evan Drummond. Agricultural Economics/2nd Ed. Virginia: Reston Publishing Company, 1982.

Dyfyniad MLA

Goodwin, John W., and H. Evan Drummond. Agricultural Economics/2nd Ed. Reston Publishing Company, 1982.

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