एपीए उद्धरण

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

शिकागो स्टाइल उद्धरण

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

एमएलए उद्धरण

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