Não informado. (2003). Product Engineering. Morgan Grampian.
Chicago (17e ed.) BronvermeldingNão informado. Product Engineering. New York: Morgan Grampian, 2003.
MLA (8e ed.) BronvermeldingNão informado. Product Engineering. Morgan Grampian, 2003.
Let op: Deze citaties zijn niet altijd 100% accuraat.