एपीए उद्धरण

M W Holdgate. (1979). APerspective if Environmental Pollution. Cambridge university Press.

शिकागो स्टाइल उद्धरण

M W Holdgate. APerspective If Environmental Pollution. Cambridge university Press, 1979.

एमएलए उद्धरण

M W Holdgate. APerspective If Environmental Pollution. Cambridge university Press, 1979.