Não informado. (1951). Wastes engineering. R.H. Donnelley, Magazine Publishing Division.
Chicago (17e ed.) BronvermeldingNão informado. Wastes Engineering. New York: R.H. Donnelley, Magazine Publishing Division, 1951.
MLA (8e ed.) BronvermeldingNão informado. Wastes Engineering. R.H. Donnelley, Magazine Publishing Division, 1951.
Let op: Deze citaties zijn niet altijd 100% accuraat.