APA (7th ed.) Citation

Geological Survey (U.S.), Berg, H. C., Elliott, R. L., & Koch, R. D. (1988). Geologic map of the Ketchikan and Prince Rupert quadrangles, southeastern Alaska. The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.), Henry C. Berg, R. L. Elliott, and R. D. Koch. Geologic Map of the Ketchikan and Prince Rupert Quadrangles, Southeastern Alaska. Reston, Va.: The Survey, 1988.

MLA (9th ed.) Citation

Geological Survey (U.S.), et al. Geologic Map of the Ketchikan and Prince Rupert Quadrangles, Southeastern Alaska. The Survey, 1988.