National Institute of Standards and Technology (U.S.). Office of Weights and Measures & Harris, G. L. (1996). Specifications and tolerances for reference standards and field standard weights and measures (1996 ed.). National Institute of Standards and Technology.
Chicago-viite (17. p.)National Institute of Standards and Technology (U.S.). Office of Weights and Measures ja Georgia L. Harris. Specifications and Tolerances for Reference Standards and Field Standard Weights and Measures. 1996 ed. Washington, D.C.: National Institute of Standards and Technology, 1996.
MLA-viite (8. p.)National Institute of Standards and Technology (U.S.). Office of Weights and Measures ja Georgia L. Harris. Specifications and Tolerances for Reference Standards and Field Standard Weights and Measures. 1996 ed. National Institute of Standards and Technology, 1996.