APA (7th ed.) Citation

Williams, H. (1964). Geologic reconnaissance of southeastern Guatemala. University of California Press.

Chicago Style (17th ed.) Citation

Williams, Howel. Geologic Reconnaissance of Southeastern Guatemala. Berkeley: University of California Press, 1964.

MLA (9th ed.) Citation

Williams, Howel. Geologic Reconnaissance of Southeastern Guatemala. University of California Press, 1964.