Cita APA (7a ed.)

Duncan, U. K. (1970). Introduction to British lichens. T. Buncle & Co..

Cita Chicago Style (17a ed.)

Duncan, Ursula K. Introduction to British Lichens. Arbroath (Angus): T. Buncle & Co., 1970.

Cita MLA (8a ed.)

Duncan, Ursula K. Introduction to British Lichens. T. Buncle & Co., 1970.