APA (7th ed.) Citation

National Institute of Standards and Technology (U.S.). (1989). WWVH: Time and frequency services (Rev. Aug. 1989.). U.S. Dept. of Commerce, National Institute of Standards and Technology.

Chicago Style (17th ed.) Citation

National Institute of Standards and Technology (U.S.). WWVH: Time and Frequency Services. Rev. Aug. 1989. [Washington, D.C.?]: U.S. Dept. of Commerce, National Institute of Standards and Technology, 1989.

MLA (8th ed.) Citation

National Institute of Standards and Technology (U.S.). WWVH: Time and Frequency Services. Rev. Aug. 1989. U.S. Dept. of Commerce, National Institute of Standards and Technology, 1989.