1. Dowden, Catalytic Hand Book, Verlag New York, Inc. 1970.
2. V.A.W. Heller, , Fundamental Motor Vehicle Technology, Edisi ke-4, FIMI Stanley Thorne (Publisehers) Ltd, 1995.
3. Warju, Influence of Usage of laminated Converter Copper catalytic of Manganese To Rate of Polutan Motor Gasoline Four Step. Institut Teknologi Surabaya. 2006.
4. Obert, Internal Combustion Engine & Air Pollution,Third Edition.Harper & Row,Publisher,Inc,New York, 1973.
5. Heisler, Advanced Engine Tecnology Hodder Headline Group, London. 1995,.