Παραπομπή APA

Ravindra Pandey. UGC NET/SLET Environmental science. Ramesh.

Παραπομπή Chicago Style

Ravindra Pandey. UGC NET/SLET Environmental Science. New Delhi: Ramesh.

Παραπομπή MLA

Ravindra Pandey. UGC NET/SLET Environmental Science. Ramesh.