Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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