APA (7th ed.) Citation
U.S. Dept. of Commerce, National Bureau of Standards, Kropschot, R. H., Birmingham, B. W., & Mann, D. B. (1968). Technology of liquid Helium.
Chicago Style (17th ed.) Citation
U.S. Dept. of Commerce, National Bureau of Standards, R. H. Kropschot, B. W. Birmingham, and D. B. Mann. Technology of Liquid Helium. Washington, 1968.
MLA (9th ed.) Citation
U.S. Dept. of Commerce, National Bureau of Standards, et al. Technology of Liquid Helium. 1968.
Warning: These citations may not always be 100% accurate.