APA (7th ed.) Citation

Clark, D. L., & Ethington, R. L. (1967). Conodonts and zonation of the Upper Devonian in the Great Basin.

Chicago Style (17th ed.) Citation

Clark, David Lindsey, and Raymond L. Ethington. Conodonts and Zonation of the Upper Devonian in the Great Basin. Boulder, Colo, 1967.

MLA (9th ed.) Citation

Clark, David Lindsey, and Raymond L. Ethington. Conodonts and Zonation of the Upper Devonian in the Great Basin. 1967.

Warning: These citations may not always be 100% accurate.