Lial, M. L., & Hornsby, J. (2000). Intermediate algebra (8th.ed.). Addison-Wesley.

Lial, Margaret L., and John Hornsby. Intermediate Algebra. 8th.ed. Massachusetts: Addison-Wesley, 2000.

Lial, Margaret L., and John Hornsby. Intermediate Algebra. 8th.ed. Addison-Wesley, 2000.