APA (7th ed.) Citation

Shaffer, S. L., & Simon, A. R. (1994). Network security. AP Professional.

Chicago Style (17th ed.) Citation

Shaffer, Steven L., and Alan R. Simon. Network Security. Boston: AP Professional, 1994.

MLA (9th ed.) Citation

Shaffer, Steven L., and Alan R. Simon. Network Security. AP Professional, 1994.