Não informado. (1929). Machine Design: As it affects engineering, production, sales. Penton Publishing.
Chicago (17e ed.) BronvermeldingNão informado. Machine Design: As It Affects Engineering, Production, Sales. Cleveland, Ohio: Penton Publishing, 1929.
MLA (8e ed.) BronvermeldingNão informado. Machine Design: As It Affects Engineering, Production, Sales. Penton Publishing, 1929.
Let op: Deze citaties zijn niet altijd 100% accuraat.