APA (7e ed.) Bronvermelding
Gupta, O. P. (2016). Elements of environmental pollution control. Khanna Book Publishing Co.
Chicago (17e ed.) Bronvermelding
Gupta, Om Prakash. Elements of Environmental Pollution Control. New Delhi: Khanna Book Publishing Co, 2016.
MLA (9e ed.) Bronvermelding
Gupta, Om Prakash. Elements of Environmental Pollution Control. Khanna Book Publishing Co, 2016.
Let op: Deze citaties zijn niet altijd 100% accuraat.