APA (7th ed.) Citation

Folk, R. L. (1968). Petrology of sedimentary rocks (1968 ed.). Hemphill's.

Chicago Style (17th ed.) Citation

Folk, Robert L. Petrology of Sedimentary Rocks. 1968 ed. Austin, Texas: Hemphill's, 1968.

MLA (9th ed.) Citation

Folk, Robert L. Petrology of Sedimentary Rocks. 1968 ed. Hemphill's, 1968.