APA (7th ed.) Citation

Elles, G. L. (1931). The study of geological maps ([2d ed.].). University press.

Chicago Style (17th ed.) Citation

Elles, G. L. The Study of Geological Maps. [2d ed.]. Cambridge: University press, 1931.

MLA (9th ed.) Citation

Elles, G. L. The Study of Geological Maps. [2d ed.]. University press, 1931.