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Book 3 of ST240, Our Chemical Environment, The Open University, 1995. ISBN 0 7492 5143 3.
Coss M., The Handmade Soap Book, New Holland (Publishers) Ltd UK, 1998. ISBN 1 8536 8807 X.
Neal's Yard Remedies, Make Your Own Cosmetics, Aurum Press, 1997. ISBN 1 8541 0469 1.
Phanstiel O. IV et al.,'Synthesis of exotic soaps in the chemistry laboratory', Journal of Chemical Education, 75:5, p. 612, 1998.