APA aipamena

Alvin, K. L. (1977). The observer's book of lichens. London: Fredeick Warne.

Chicago Style aipamena

Alvin, Kenneth L. The Observer's Book of Lichens. London: Fredeick Warne, 1977.

MLA aipamena

Alvin, Kenneth L. The Observer's Book of Lichens. London: Fredeick Warne, 1977.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.