APA (7th ed.) Citation

Bristol, H. M., & Prescott, R. (1968). Geology and oil production in the Tuscola area, Illinois. [publisher not identified].

Chicago Style (17th ed.) Citation

Bristol, H. M., and Ronald Prescott. Geology and Oil Production in the Tuscola Area, Illinois. Urbana: [publisher not identified], 1968.

MLA (9th ed.) Citation

Bristol, H. M., and Ronald Prescott. Geology and Oil Production in the Tuscola Area, Illinois. [publisher not identified], 1968.