APA(7版)引用形式

Kumra, V. K., Nag, P., & Singh, J. (1997). Geography and environment. Concept Publishing.

Chicagoスタイル(17版)引用形式

Kumra, V. K., Prithvish Nag, , Jagdish Singh. Geography and Environment. New Delhi: Concept Publishing, 1997.

MLA(9版)引用形式

Kumra, V. K., et al. Geography and Environment. Concept Publishing, 1997.