1. Whymper, R. Cocoa and Chocolate, Their Chemistry and Manufacture. Churchill, London (1912).
2. Minifie, B.W. Chocolate, Cocoa and Confectionery. 2nd edn., Avi Publishing Co. Inc., Westport, Connecticut (1980).
3. Cook, L.R. (revised by E.H. Meursing) Chocolate Production and Use. Harcourt Brace Jovanovitch, New York (1984).