APA aipamena

Keeton, W. T. (1967). Biological science. New York: W.W.Norton.

Chicago Style aipamena

Keeton, W T. Biological Science. New York: W.W.Norton, 1967.

MLA aipamena

Keeton, W T. Biological Science. New York: W.W.Norton, 1967.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.