APA (7e ed.) Bronvermelding
Kumra, V. K., Nag, P., & Singh, J. (1997). Geography and environment. Concept Publishing.
Chicago (17e ed.) Bronvermelding
Kumra, V. K., Prithvish Nag, en Jagdish Singh. Geography and Environment. New Delhi: Concept Publishing, 1997.
MLA (9e ed.) Bronvermelding
Kumra, V. K., et al. Geography and Environment. Concept Publishing, 1997.
Let op: Deze citaties zijn niet altijd 100% accuraat.