Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.