Citazione Stile APA (7a Edizione)

Karpagam, M. (1999). Environmental economics: A textbook (Rev. ed.). Sterling Publishers.

Citazione stile Chigago Style (17a edizione)

Karpagam, M. Environmental Economics: A Textbook. Rev. ed. New Delhi: Sterling Publishers, 1999.

Citatione MLA (9a ed.)

Karpagam, M. Environmental Economics: A Textbook. Rev. ed. Sterling Publishers, 1999.