एपीए उद्धरण

Gurdeep Raj; Author. (1987). Dictionary of environment.

शिकागो स्टाइल उद्धरण

Gurdeep Raj; Author. Dictionary of Environment. New Delhi, Anmol Publications, 1987.

एमएलए उद्धरण

Gurdeep Raj; Author. Dictionary of Environment. 1987.