Found in articles
Watt
Advancement of Science) dalam tahun 1889 dan oleh en:General Conference on Weights and Measures ke-11 dalam tahun 1960. 1 watt ≈ 3.412141630 BTU/jam 1
ISBN 978-0-393-07298-3. Templat:SIbrochure9th International Bureau of Weights and Measures (BIPM) (10 August 2017). "Input data for the special CODATA-2017
Consultative Committee for Units (CCU), April 2001, 2. (ii); General Conference on Weights and Measures, 22nd Meeting, October 2003, which stated "The kilogram
yang asal pada 2010-12-25. Dicapai pada 2010-03-02. "Appendix G: Weights and Measures". The World Factbook. CIA. Diarkibkan daripada yang asal pada 2011-04-06