APA (7th ed.) Citation

Urban Sciences, Inc, National Institute of Law Enforcement and Criminal Justice, & Law Enforcement Standards Laboratory. (1977). Digital data transmission tests on voice channels. NBS : for sale by the Supt. of Docs., U.S. Govt. Print. Off..

Chicago Style (17th ed.) Citation

Urban Sciences, Inc, National Institute of Law Enforcement and Criminal Justice, and Law Enforcement Standards Laboratory. Digital Data Transmission Tests on Voice Channels. Washington: NBS : for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1977.

MLA (8th ed.) Citation

Urban Sciences, Inc, et al. Digital Data Transmission Tests on Voice Channels. NBS : for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1977.