APA引文

Penson,John B. (1986). Introduction to agricultural economics. Prentice Hall.

Chicago Edition Citation

Penson,John B. Introduction to Agricultural Economics. New Jersey: Prentice Hall, 1986.

MLA引文

Penson,John B. Introduction to Agricultural Economics. Prentice Hall, 1986.

警告：这些引文格式不一定是100％准确.