APA (7th ed.) Citation

Geological Survey (U.S.), Yerkes, R. F., & Campbell, R. H. (1993). Preliminary geologic map of the Calabasas 7.5' quadrangle, Southern California. The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.), R. F. Yerkes, and Russell H. Campbell. Preliminary Geologic Map of the Calabasas 7.5' Quadrangle, Southern California. [Menlo Park, Calif.]: The Survey, 1993.

MLA (9th ed.) Citation

Geological Survey (U.S.), et al. Preliminary Geologic Map of the Calabasas 7.5' Quadrangle, Southern California. The Survey, 1993.