Style de citation APA

Radha,S, & Sankhyan,Amar Singh. (2004). Environmental challenges of the 21st century. Deep & Deep.

Style de citation Chicago

Radha,S, et Sankhyan,Amar Singh. Environmental Challenges of the 21st Century. New Delhi: Deep & Deep, 2004.

Style de citation MLA

Radha,S, et Sankhyan,Amar Singh. Environmental Challenges of the 21st Century. Deep & Deep, 2004.

Attention : ces citations peuvent ne pas être correctes à 100%.