Παραπομπή APA

Trivedi, P. R. (1999). Encyclopedia of world environment Vol 2, Environment.

Παραπομπή Chicago Style

Trivedi, P R. Encyclopedia of World Environment Vol 2, Environment. New Delhi, A P H Publishing Corporation, 1999.

Παραπομπή MLA

Trivedi, P R. Encyclopedia of World Environment Vol 2, Environment. 1999.