Scott, T. W., Harris, G. L., & Ugiansky, G. M. (1997). Specifications and tolerances for reference standards and field standard weights and measures (1997 ed.). U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Scott, Timothy W., Georgia L. Harris, و G. M. Ugiansky. Specifications and Tolerances for Reference Standards and Field Standard Weights and Measures. 1997 ed. Gaithersburg, Md.: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 1997.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Scott, Timothy W., et al. Specifications and Tolerances for Reference Standards and Field Standard Weights and Measures. 1997 ed. U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 1997.