APA (7th ed.) Citation

Willden, R., Reed, J. C., Jr., & Carlson, J. E. (1968). Transcontinental geophysical survey (35⁰-39⁰ N): Geologic map from the East Coast of the United States to 87⁰ W longitude. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Willden, Ronald, John Calvin Reed, Jr, and John Edward Carlson. Transcontinental Geophysical Survey (35⁰-39⁰ N): Geologic Map from the East Coast of the United States to 87⁰ W Longitude. Washington, D.C.: U.S. Geological Survey, 1968.

MLA (9th ed.) Citation

Willden, Ronald, et al. Transcontinental Geophysical Survey (35⁰-39⁰ N): Geologic Map from the East Coast of the United States to 87⁰ W Longitude. U.S. Geological Survey, 1968.