APA (7th ed.) Citation

Combs, C. C., & Combs, C. C. (1997). Terrorism in the twenty-first century. Prentice Hall.

Chicago Style (17th ed.) Citation

Combs, Cynthia C., and Cindy C. Combs. Terrorism in the Twenty-first Century. Upper Saddle River, N.J: Prentice Hall, 1997.

MLA (8th ed.) Citation

Combs, Cynthia C., and Cindy C. Combs. Terrorism in the Twenty-first Century. Prentice Hall, 1997.