APA استشهاد

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

استشهاد بنمط شيكاغو

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

MLA استشهاد

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