Cita APA (7th ed.)
De, A. K., & De, A. K. (2001). Environmental studies. New Age International.
Cita Chicago (17th ed.)
De, Anil Kumar, i Arnab Kumar De. Environmental Studies. Calcutta: New Age International, 2001.
Cita MLA (9th ed.)
De, Anil Kumar, i Arnab Kumar De. Environmental Studies. New Age International, 2001.
Atenció: Aquestes cites poden no estar 100% correctes.