APA aipamena

Anil Tyagi. (2013). Trueman's UGC-NET Environmental science (2013, 2015 & 2016.). Danika publishing company.

Chicago Style aipamena

Anil Tyagi. Trueman's UGC-NET Environmental Science. 2013, 2015 & 2016. New Delhi: Danika publishing company, 2013.

MLA aipamena

Anil Tyagi. Trueman's UGC-NET Environmental Science. 2013, 2015 & 2016. Danika publishing company, 2013.

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