Παραπομπή APA

Trivedi. P.R & Gurdeep Raj. (1992). Concepts in Environment. Akasheddp.

Παραπομπή Chicago Style

Trivedi. P.R και Gurdeep Raj. Concepts in Environment. New Delhi: Akasheddp, 1992.

Παραπομπή MLA

Trivedi. P.R και Gurdeep Raj. Concepts in Environment. Akasheddp, 1992.