Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

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