APA引文

Spite, G. F. (1990). Agricultural and food policy. Washington: National Agricultural and Food Policy.

Trích dẫn kiểu Chicago

Spite, G. F. Agricultural and Food Policy. Washington: National Agricultural and Food Policy, 1990.

MLA引文

Spite, G. F. Agricultural and Food Policy. Washington: National Agricultural and Food Policy, 1990.

警告：這些引文格式不一定是100％准確.