APA (7th ed.) Zitazioa

Gupta, S. (2000). Global environment: Current status. Sarup & Sons.

Chicago Style (17th ed.) Zitazioa

Gupta, Sunit. Global Environment: Current Status. New Delhi: Sarup & Sons, 2000.

MLA (9th ed.) Zitazioa

Gupta, Sunit. Global Environment: Current Status. Sarup & Sons, 2000.