1. Guenther, E. (1948).The essential oils. Vol I. History, Origin in plants, Products-Analysis. 427. Robert Krieger Publishing Componey. USA.
2. Goubran, F.H. and Holmes, R.J. (1993).The development of alternative fungicides from essential oils Victoria, Australia: Institute for Horticultural Development, Knoxfield, Department of Agriculture.
3. Wijesekara, R.O.B., Ratnatunga, C.M. and Durbeck, K. (1997).The distillation of essential oils. Manufacturing and Plant Construction Handbook Eschborn. Federal Republic of Germany: Protrade, Department of Foodstuffs & Agricultural Products.
4. Heywood, V.H. (1979).Flowering Plants of the World. Oxford University Press: Oxford, U.K.
5. Foster, S. (1990).Peppermint,Mentha piperita. In Botanical Series; American Botanical Council: Austin, TX, no 306.