APA aipamena

Raj, G., & Trivedi, P. R. (1992). Encyclopaedia of Environmental sciences.

Chicago Style aipamena

Raj, Gurdeep, and P R. Trivedi. Encyclopaedia of Environmental Sciences. New Delhi, Akashdeep, 1992.

MLA aipamena

Raj, Gurdeep, and P R. Trivedi. Encyclopaedia of Environmental Sciences. 1992.