APA (7th ed.) Citation

Shedlock, K. M., & Johnston, A. C. (1994). Investigations of the New Madrid seismic zone. U.S. Department of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Shedlock, Kaye M., and Arch C. Johnston. Investigations of the New Madrid Seismic Zone. Washington: U.S. Department of the Interior, U.S. Geological Survey, 1994.

MLA (9th ed.) Citation

Shedlock, Kaye M., and Arch C. Johnston. Investigations of the New Madrid Seismic Zone. U.S. Department of the Interior, U.S. Geological Survey, 1994.