Tohutoro APA (7th ed.)
Agrawal, K., & P.K. Sikdar and S.C. Deb. (2002). A textbook of environment. Macmillan.
Tohutoru Kātū Chicago (17th ed.)
Agrawal, K.M, me P.K. Sikdar and S.C. Deb. A Textbook of Environment. Kolkata: Macmillan, 2002.
Tohutoro MLA (9th ed.)
Agrawal, K.M, me P.K. Sikdar and S.C. Deb. A Textbook of Environment. Macmillan, 2002.
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