APA (7th ed.) Citation

Clarke, P. F., Hodgson, H. E., & North, G. W. (1978). A guide to obtaining information from the USGS. United States Department of the Interior, Geological Survey.

Chicago Style (17th ed.) Citation

Clarke, Paul F., Helen E. Hodgson, and Gary W. North. A Guide to Obtaining Information from the USGS. Reston, Va.: United States Department of the Interior, Geological Survey, 1978.

MLA (9th ed.) Citation

Clarke, Paul F., et al. A Guide to Obtaining Information from the USGS. United States Department of the Interior, Geological Survey, 1978.