APA (7th ed.) Citation

Geological Survey (U.S.), Drake, A. A., Hall, L. M., & Nelson, A. E. (1988). Basement and basement-cover relation map of the Appalachian orogen in the United States. The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.), Avery Ala Drake, Leo M. Hall, and Arthur E. Nelson. Basement and Basement-cover Relation Map of the Appalachian Orogen in the United States. Reston, Va.: The Survey, 1988.

MLA (9th ed.) Citation

Geological Survey (U.S.), et al. Basement and Basement-cover Relation Map of the Appalachian Orogen in the United States. The Survey, 1988.