Não informado. (1934). Industrial Heating. Business News Publishing.
Chicago (17e ed.) BronvermeldingNão informado. Industrial Heating. Pittsburgh, Pa: Business News Publishing, 1934.
MLA (8e ed.) BronvermeldingNão informado. Industrial Heating. Business News Publishing, 1934.
Let op: Deze citaties zijn niet altijd 100% accuraat.