Παραπομπή APA

Sharma, D. (2013). Basics of environmental science. Advance Lenarner Press.

Παραπομπή Chicago Style

Sharma, D.K. Basics of Environmental Science. New Delhi: Advance Lenarner Press, 2013.

Παραπομπή MLA

Sharma, D.K. Basics of Environmental Science. Advance Lenarner Press, 2013.