Citazione APA

Sengar,K.S, & Chauhan,G.S. (2012). Global Environment: Issues and problems. L.G.Publishers.

Stile di citazione Chicago

Sengar,K.S, e Chauhan,G.S. Global Environment: Issues and Problems. Delhi: L.G.Publishers, 2012.

Citazione MLA

Sengar,K.S, e Chauhan,G.S. Global Environment: Issues and Problems. L.G.Publishers, 2012.

Attenzione: Queste citazioni potrebbero non essere precise al 100%.