APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.