Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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