APA aipamena

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 aipamena

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 aipamena

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.