APA-referens

DE RAJ KHANNA. ECOLOGY AND POLLUTION OF GANGA RIVER. ASHISH PUBLISHING HOUSE.

Chicago-stil citat

DE RAJ KHANNA. ECOLOGY AND POLLUTION OF GANGA RIVER. ASHISH PUBLISHING HOUSE.

MLA-referens

DE RAJ KHANNA. ECOLOGY AND POLLUTION OF GANGA RIVER. ASHISH PUBLISHING HOUSE.

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