Não informado. (1927). DSIR bulletin. Department of Scientific and Industrial Research.
Chicago (17e ed.) BronvermeldingNão informado. DSIR Bulletin. Wellington: Department of Scientific and Industrial Research, 1927.
MLA (8e ed.) BronvermeldingNão informado. DSIR Bulletin. Department of Scientific and Industrial Research, 1927.
Let op: Deze citaties zijn niet altijd 100% accuraat.