APA (7th ed.) Citation

Richards, L. W., & Richards, G. L. (1934). Geologic history at a glance. Stanford university press.

Chicago Style (17th ed.) Citation

Richards, L. W., and George Lambert Richards. Geologic History at a Glance. Stanford University, Calif.: Stanford university press, 1934.

MLA (9th ed.) Citation

Richards, L. W., and George Lambert Richards. Geologic History at a Glance. Stanford university press, 1934.