एपीए उद्धरण

Kumar, A., & Nehar, S. (2007). Environmental protection. Daya Publishing House.

शिकागो स्टाइल उद्धरण

Kumar, Arvind, और Shamshun Nehar. Environmental Protection. Delhi: Daya Publishing House, 2007.

एमएलए उद्धरण

Kumar, Arvind, और Shamshun Nehar. Environmental Protection. Daya Publishing House, 2007.