Παραπομπή APA

Anil Tyagi. (2009). Trueman's UGC NET/SLET Environmental Science. Danika publishing house.

Παραπομπή Chicago Style

Anil Tyagi. Trueman's UGC NET/SLET Environmental Science. New Delhi: Danika publishing house, 2009.

Παραπομπή MLA

Anil Tyagi. Trueman's UGC NET/SLET Environmental Science. Danika publishing house, 2009.