APA (7th ed.) Citation

Williams, H., Coats, R. R., Hay, R. L., & Anderson, C. A. (1968). Studies in volcanology: A memoir in honor of Howel Williams. Geological Society of America.

Chicago Style (17th ed.) Citation

Williams, Howel, Robert R. Coats, Richard LeRoy Hay, and Charles A. Anderson. Studies in Volcanology: A Memoir in Honor of Howel Williams. [Boulder, Colo.]: Geological Society of America, 1968.

MLA (9th ed.) Citation

Williams, Howel, et al. Studies in Volcanology: A Memoir in Honor of Howel Williams. Geological Society of America, 1968.