APA (7th ed.) Citation

Butler, B. S., Wilson, E., & Rasor, C. A. (1938). Geology and ore deposits of the Tombstone district, Arizona. University of Arizona.

Chicago Style (17th ed.) Citation

Butler, B. S., Eldred Wilson, and Charles Alfred Rasor. Geology and Ore Deposits of the Tombstone District, Arizona. Tucson, Ariz.: University of Arizona, 1938.

MLA (9th ed.) Citation

Butler, B. S., et al. Geology and Ore Deposits of the Tombstone District, Arizona. University of Arizona, 1938.