Não informado. (1961). Rubber and Plastics Weekly. Maclaren and Sons.
Chicago (17e ed.) BronvermeldingNão informado. Rubber and Plastics Weekly. London: Maclaren and Sons, 1961.
MLA (8e ed.) BronvermeldingNão informado. Rubber and Plastics Weekly. Maclaren and Sons, 1961.
Let op: Deze citaties zijn niet altijd 100% accuraat.