Cita APA

Karpagam,M. (1991). Environmental economics: A text book. Sterling Publishers Pvt. Ltd.

Citación estilo Chicago

Karpagam,M. Environmental Economics: A Text Book. New Delhi: Sterling Publishers Pvt. Ltd, 1991.

Cita MLA

Karpagam,M. Environmental Economics: A Text Book. Sterling Publishers Pvt. Ltd, 1991.