APA引文

Widdowson, R. W. (1987). Towards holistic agriculture: A scientific approach. New York: Pergamon Press.

Trích dẫn kiểu Chicago

Widdowson, R. W. Towards Holistic Agriculture: A Scientific Approach. New York: Pergamon Press, 1987.

MLA引文

Widdowson, R. W. Towards Holistic Agriculture: A Scientific Approach. New York: Pergamon Press, 1987.

警告：这些引文格式不一定是100％准确.