Não informado. (1903). Circular of the Bureau of Standards. U.S. Department of Commerce, National Bureau of Standards.
Chicago-Zitierstil (17. Ausg.)Não informado. Circular of the Bureau of Standards. Washington: U.S. Department of Commerce, National Bureau of Standards, 1903.
MLA-Zitierstil (8. Ausg.)Não informado. Circular of the Bureau of Standards. U.S. Department of Commerce, National Bureau of Standards, 1903.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.