APA (7th ed.) Citation

Williams, J. (1961). A small battery-operated hydrophotometer. Chesapeake Bay Institute, Johns Hopkins University.

Chicago Style (17th ed.) Citation

Williams, Jerome. A Small Battery-operated Hydrophotometer. [Baltimore, Md.?]: Chesapeake Bay Institute, Johns Hopkins University, 1961.

MLA (9th ed.) Citation

Williams, Jerome. A Small Battery-operated Hydrophotometer. Chesapeake Bay Institute, Johns Hopkins University, 1961.