APA استشهاد

Arvind Kumar, P. K. (2008). Environmental issues and solutions. Daya.

استشهاد بنمط شيكاغو

Arvind Kumar, Pashupati Kumar. Environmental Issues and Solutions. Delhi: Daya, 2008.

MLA استشهاد

Arvind Kumar, Pashupati Kumar. Environmental Issues and Solutions. Daya, 2008.