APA引文

Karpagam, M. (2006). Environmental economics: A text book. Sterling publishers.

Chicago Edition Citation

Karpagam, M. Environmental Economics: A Text Book. New Delhi: Sterling publishers, 2006.

MLA引文

Karpagam, M. Environmental Economics: A Text Book. Sterling publishers, 2006.

警告：這些引文格式不一定是100％准確.