APA način citiranja

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

Čikaški stil citiranja

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

MLA način citiranja

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

Upozorenje: Ovi citati možda nisu uvijek 100% točni.