Wolfram, S. (1999). The mathematica book (4th ed.). Wolfram Media ; Cambridge University Press.

Wolfram, Stephen. The Mathematica Book. 4th ed. Champaign, IL : New York: Wolfram Media ; Cambridge University Press, 1999.

Wolfram, Stephen. The Mathematica Book. 4th ed. Wolfram Media ; Cambridge University Press, 1999.