APA (7th ed.) Citation

Henssen, A. M., & James, P. W. (1982). The lichen genus Steinera. British Museum.

Chicago Style (17th ed.) Citation

Henssen, Aino M., and Peter W. James. The Lichen Genus Steinera. London: British Museum, 1982.

MLA (9th ed.) Citation

Henssen, Aino M., and Peter W. James. The Lichen Genus Steinera. British Museum, 1982.