Παραπομπή APA

Trivedi, P. R. (1998). Encyclopaedia of environment, pollution , planning and conservation. A.P.H.

Παραπομπή Chicago Style

Trivedi, P. R. Encyclopaedia of Environment, Pollution , Planning and Conservation. New Delhi: A.P.H, 1998.

Παραπομπή MLA

Trivedi, P. R. Encyclopaedia of Environment, Pollution , Planning and Conservation. A.P.H, 1998.