1. National Oilseed Processors Association (NOPA), Yearbook and Trading Rules, reissued annually, Washington, DC.
2. Official Methods and Recommended Practices of the American Oil Chemists’ Society (AOCS),1993
3. Shipment of Edible Oils;Farrer,1992
4. Official Methods of Analysis of the AOAC,1984
5. Laboratory Handbook for Oil and Fat Analysts;Cocks,1966