Bransden, B. H., and C. J. Joachain, Quantum Mechanics, 2nd ed (Harlow: Prentice Hall, 2000)
Gasiorowicz, Stephen, Quantum Physics, 3rd Revised edition (New York: John Wiley and Sons Ltd, 2003)
Griffiths, David J., Introduction to Quantum Mechanics, 2nd edition (Pearson Education (US), 2003)