APA (7th ed.) Citation

Carr, R., & Shafer, D. (1991). The power of PenPoint. Addison Wesley.

Chicago Style (17th ed.) Citation

Carr, Robert, and Dan Shafer. The Power of PenPoint. Reading, Mass: Addison Wesley, 1991.

MLA (9th ed.) Citation

Carr, Robert, and Dan Shafer. The Power of PenPoint. Addison Wesley, 1991.