APA (7th ed.) Citation

Wolfram, S. (1991). Mathematica: A system for doing mathematics by computer (2. ed.). Addison-Wesley.

Chicago Style (17th ed.) Citation

Wolfram, Stephen. Mathematica: A System for Doing Mathematics by Computer. 2. ed. Redwood City, Calif. [u.a.]: Addison-Wesley, 1991.

MLA (9th ed.) Citation

Wolfram, Stephen. Mathematica: A System for Doing Mathematics by Computer. 2. ed. Addison-Wesley, 1991.