APA(7版)引用形式
Poonia, M., & Sharma, S. (2017). Environmental studies. Khanna Book Publishing Co.
Chicagoスタイル(17版)引用形式
Poonia, M.P, , S.C Sharma. Environmental Studies. New Delhi: Khanna Book Publishing Co, 2017.
MLA(9版)引用形式
Poonia, M.P, , S.C Sharma. Environmental Studies. Khanna Book Publishing Co, 2017.
警告: この引用は必ずしも正確ではありません.