Richardson, E. V., Posakony, G. J., & Simons, D. B. (1961). Sonic depth sounder for laboratory and field use. United States Department of the Interior, Geological Survey.
Chicago Style (17th ed.) CitationRichardson, E. V., G. J. Posakony, and Daryl B. Simons. Sonic Depth Sounder for Laboratory and Field Use. Washington: United States Department of the Interior, Geological Survey, 1961.
MLA (9th ed.) CitationRichardson, E. V., et al. Sonic Depth Sounder for Laboratory and Field Use. United States Department of the Interior, Geological Survey, 1961.
Warning: These citations may not always be 100% accurate.