APA引文

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

Chicago Edition Citation

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

MLA引文

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

警告：這些引文格式不一定是100％准確.