Cita APA (7th ed.)
Agrawal, K., & P.K. Sikdar and S.C. Deb. (2002). A textbook of environment. Macmillan.
Cita Chicago (17th ed.)
Agrawal, K.M, i P.K. Sikdar and S.C. Deb. A Textbook of Environment. Kolkata: Macmillan, 2002.
Cita MLA (9th ed.)
Agrawal, K.M, i P.K. Sikdar and S.C. Deb. A Textbook of Environment. Macmillan, 2002.
Atenció: Aquestes cites poden no estar 100% correctes.