Não informado. (1928). Laboratory. Fisher Scientific Company, Technical Department.
Chicago (17e ed.) BronvermeldingNão informado. Laboratory. Pittsburgh, Pa: Fisher Scientific Company, Technical Department, 1928.
MLA (8e ed.) BronvermeldingNão informado. Laboratory. Fisher Scientific Company, Technical Department, 1928.
Let op: Deze citaties zijn niet altijd 100% accuraat.