APA引文

Gopalakrishnana, P. (1990). Purchasing and materials management.

芝加哥风格引文

Gopalakrishnana, P. Purchasing and Materials Management. New Delhi, 1990.

MLA引文

Gopalakrishnana, P. Purchasing and Materials Management. 1990.

警告：这些引文格式不一定是100％准确.