Tohutoro APA (7th ed.)

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

Tohutoru Kātū Chicago (17th ed.)

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

Tohutoro MLA (9th ed.)

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