एपीए उद्धरण

(2010). The environment encyclopedia and directory 2010 (5th ed.). Routledge.

शिकागो स्टाइल उद्धरण

The Environment Encyclopedia and Directory 2010. 5th ed. Singer street, London: Routledge, 2010.

एमएलए उद्धरण

The Environment Encyclopedia and Directory 2010. 5th ed. Routledge, 2010.