एपीए उद्धरण

Arvind Kumar. (2009). Integrated environmental management. Daya.

शिकागो स्टाइल उद्धरण

Arvind Kumar. Integrated Environmental Management. Delhi: Daya, 2009.

एमएलए उद्धरण

Arvind Kumar. Integrated Environmental Management. Daya, 2009.