APA (7th ed.) Citation

Smith, A. L. (1921). A handbook of the British lichens. British Museum [u.a.].

Chicago Style (17th ed.) Citation

Smith, Annie Lorrain. A Handbook of the British Lichens. London: British Museum [u.a.], 1921.

MLA (9th ed.) Citation

Smith, Annie Lorrain. A Handbook of the British Lichens. British Museum [u.a.], 1921.