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2- Inorganic Chemistry, C. E. Housecroft, A. G. Sharpe, Prentice- Hall, Third Edition, 2007. 3- Inorganic Chemistry, G. L. Miessler, D. A. Tarr, Prentice- Hall, Third Edition.
4- Concepts and Models of Inorganic Chemistry, B. Douglas, D. McDaniel, J. Alexander, Wiley, Third Edition, 1994.
5- Inorganic Chemistry: Principles of Structure and Reactivity, J. E. Huheey, E. A. Keiter, and R. L. Keiter, Prentice-Hall, 4th Edition , 1997. .