APA (7th ed.) Citation
Poonia, M., & Sharma, S. (2017). Environmental studies. Khanna Book Publishing Co.
Chicago Style (17th ed.) Citation
Poonia, M.P, and S.C Sharma. Environmental Studies. New Delhi: Khanna Book Publishing Co, 2017.
MLA (9th ed.) Citation
Poonia, M.P, and S.C Sharma. Environmental Studies. Khanna Book Publishing Co, 2017.
Warning: These citations may not always be 100% accurate.