Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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