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