एपीए उद्धरण

Khanna,D R, Chopra,A K, Vikas Singh, & Bhutiani,R. (2013). Environmental Management. Daya.

शिकागो स्टाइल उद्धरण

Khanna,D R, Chopra,A K, Vikas Singh, और Bhutiani,R. Environmental Management. New Delhi: Daya, 2013.

एमएलए उद्धरण

Khanna,D R, et al. Environmental Management. Daya, 2013.