Não informado. (1928). Bureau of Standards Journal Research. U.S. Department of Commerce, National Bureau of Standards.
Chicago-Zitierstil (17. Ausg.)Não informado. Bureau of Standards Journal Research. Washington: U.S. Department of Commerce, National Bureau of Standards, 1928.
MLA-Zitierstil (8. Ausg.)Não informado. Bureau of Standards Journal Research. U.S. Department of Commerce, National Bureau of Standards, 1928.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.