Table 6 (Non-SI units accepted for use with the International System).
National Institute of Standards and Technology (11 Novembris 2000). "Appendix C: General tables of units of measurement". NIST Handbook 44: Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices. National Institute of Standards and Technology
Taylor, B. N., et A. Thompson, eds. 2008a. The International System of Units (SI). United States version of the English text of the eighth edition (2006) of the International Bureau of Weights and Measures publication Le Système International d’ Unités (SI) (Special Publication 330). Gaithersburgi Terrae Mariae: National Institute of Standards and Technology.