Cita APA

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

Chicago Style Citation

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

Cita MLA

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

Atenció: Aquestes cites poden no estar 100% correctes.