Dyfyniad APA

Drummond,H Evan, & Goodwin,John W. (1982). Agricultural economics (2.). Reston Publishing Company.

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

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