एपीए उद्धरण

Purdon P. Walton. (1971). Environmental health. Academic Press.

शिकागो स्टाइल उद्धरण

Purdon P. Walton. Environmental Health. Academic Press, 1971.

एमएलए उद्धरण

Purdon P. Walton. Environmental Health. Academic Press, 1971.