Agarwal, S. (1997). Environmental issues and themes. S.B. Nangia for APH Publishing Corporation.
Chicago (17e ed.) BronvermeldingAgarwal, S.K. Environmental Issues and Themes. New Delhi: S.B. Nangia for APH Publishing Corporation, 1997.
MLA (9e ed.) BronvermeldingAgarwal, S.K. Environmental Issues and Themes. S.B. Nangia for APH Publishing Corporation, 1997.
Let op: Deze citaties zijn niet altijd 100% accuraat.