1. AOAC 1980 Official Methods of Analysis (13th edn). Association of Official Analytical Chemists, Washington, DC, USA.
2. 1976 Lipid Analysis (1st edn). Pergamon Press, Oxford, UK.
3. 1963 Laboratoriumsbuch für den Lebensmittclchemiker (8th edn). Verlag Von Theodor Steinkopff, Dresden, Germany.
4. , 1981 Pearson's Chemical Analysis of Foods (8th edn). Churchill Livingstone, Edinburgh, UK.
5. IUPAC 1979 Standard Methods for the Analysis of Oils, Fats and Derivatives (6th edn). Pergamon Press, Oxford. UK.