APA način citiranja

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

Čikaški stil citiranja

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

MLA način citiranja

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

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