एपीए उद्धरण

Hughes, D. (1992). Environmental Law (2nd ed.). Butterworths.

शिकागो स्टाइल उद्धरण

Hughes, David. Environmental Law. 2nd ed. London: Butterworths, 1992.

एमएलए उद्धरण

Hughes, David. Environmental Law. 2nd ed. Butterworths, 1992.