APA (7th ed.) Citation

Dahl, E. (1968). Analytical keys to British Macrolichens (Second edition revised 1968.). British Lichen Society.

Chicago Style (17th ed.) Citation

Dahl, Eilif. Analytical Keys to British Macrolichens. Second edition revised 1968. London: British Lichen Society, 1968.

MLA (9th ed.) Citation

Dahl, Eilif. Analytical Keys to British Macrolichens. Second edition revised 1968. British Lichen Society, 1968.

Warning: These citations may not always be 100% accurate.