Dyfyniad APA

Knutson,Ronald D, & Penn,J B. (1995). Agricultural and food policy (3.). Prentice Hall Education Career and technology.

Dyfyniad Arddull Chicago

Knutson,Ronald D, and Penn,J B. Agricultural and Food Policy. 3. New Jersey: Prentice Hall Education Career and technology, 1995.

Dyfyniad MLA

Knutson,Ronald D, and Penn,J B. Agricultural and Food Policy. 3. Prentice Hall Education Career and technology, 1995.

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