Não informado. (2000). Technical news from the National Bureau of Standards. U.S. Department of Commerce.
Chicago (17e ed.) BronvermeldingNão informado. Technical News from the National Bureau of Standards. Washington: U.S. Department of Commerce, 2000.
MLA (8e ed.) BronvermeldingNão informado. Technical News from the National Bureau of Standards. U.S. Department of Commerce, 2000.
Let op: Deze citaties zijn niet altijd 100% accuraat.