1. Adams, C. D. 1972. Flowering plants of Jamaica. Univ. of West Indies, Mona, Jamaica.
2. Alain, Hno. (E. E. Liogier). 1962. Flora de Cuba. Vol. 5. Editorial Universitaria, Univ. de Puerto Rico, Rio Piedras, P.R.
3. Alston, A. H. G. 1938. The Kandy flora. Ceylon Gov’t Press, Colombo, Ceylon.
4. Altschul, S. V. R. 1973. Drugs and foods from little known plants. Harvard Univ. Press, Cambridge, MA.
5. Anonymous. 1962. Wealth of India: raw materials. Vol. 6. Coun. Sci. & Indus. Res., Delhi, India.