APA (7th ed.) Citation

Beehler, R. E., & Lombardi, M. A. (1991). NIST time and frequency services (Rev. 1990.). U.S. Dept. of Commerce, National Institute of Standards and Technology.

Chicago Style (17th ed.) Citation

Beehler, Roger E., and Michael A. Lombardi. NIST Time and Frequency Services. Rev. 1990. Gaithersburg, MD: U.S. Dept. of Commerce, National Institute of Standards and Technology, 1991.

MLA (8th ed.) Citation

Beehler, Roger E., and Michael A. Lombardi. NIST Time and Frequency Services. Rev. 1990. U.S. Dept. of Commerce, National Institute of Standards and Technology, 1991.