Cita APA

Tyagi, A. (2007). UGC NET/SLET: Environmental science. Danika Publishing company.

Chicago Edition Citation

Tyagi, Anil. UGC NET/SLET: Environmental Science. New Delhi: Danika Publishing company, 2007.

Cita MLA

Tyagi, Anil. UGC NET/SLET: Environmental Science. Danika Publishing company, 2007.