Não informado. (1928). Instruments: The magazine of measurement and control. Instruments Publishing.
Chicago-Zitierstil (17. Ausg.)Não informado. Instruments: The Magazine of Measurement and Control. Pontiac, Ill: Instruments Publishing, 1928.
MLA-Zitierstil (8. Ausg.)Não informado. Instruments: The Magazine of Measurement and Control. Instruments Publishing, 1928.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.