Tohutoro APA (7th ed.)
Gupta, O. P. (2016). Elements of environmental pollution control. Khanna Book Publishing Co.
Tohutoru Kātū Chicago (17th ed.)
Gupta, Om Prakash. Elements of Environmental Pollution Control. New Delhi: Khanna Book Publishing Co, 2016.
Tohutoro MLA (9th ed.)
Gupta, Om Prakash. Elements of Environmental Pollution Control. Khanna Book Publishing Co, 2016.
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