APA (7th ed.) Citation

United States. National Bureau of Standards. (1941). Report of the Thirtieth National Conference on Weights and Measures, Attended by Representatives from Various States, Held at the National Bureau of Standards, Washington, D.C., June 4,5,6, and 7, 1939. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. National Bureau of Standards. Report of the Thirtieth National Conference on Weights and Measures, Attended by Representatives from Various States, Held at the National Bureau of Standards, Washington, D.C., June 4,5,6, and 7, 1939. [Washington]: [publisher not identified], 1941.

MLA (9th ed.) Citation

United States. National Bureau of Standards. Report of the Thirtieth National Conference on Weights and Measures, Attended by Representatives from Various States, Held at the National Bureau of Standards, Washington, D.C., June 4,5,6, and 7, 1939. [publisher not identified], 1941.