APA (7th ed.) Citation

Geological Survey (U.S.), Ambroziak, R. A., Arndt, R. E., Bawiec, W. J., King, P. B., & Schruben, P. G. (1998). Geology of the conterminous United States at 1:2,500,000 scale: A digital representation of the 1974 P.B. King and H.M. Beikman map (Release 2, 1998.). The Survey ; For sale by USGS Map Distribution.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.), Russell A. Ambroziak, Raymond E. Arndt, W. J. Bawiec, Philip B. King, and Paul G. Schruben. Geology of the Conterminous United States at 1:2,500,000 Scale: A Digital Representation of the 1974 P.B. King and H.M. Beikman Map. Release 2, 1998. Reston, VA : Denver, CO: The Survey ; For sale by USGS Map Distribution, 1998.

MLA (9th ed.) Citation

Geological Survey (U.S.), et al. Geology of the Conterminous United States at 1:2,500,000 Scale: A Digital Representation of the 1974 P.B. King and H.M. Beikman Map. Release 2, 1998. The Survey ; For sale by USGS Map Distribution, 1998.