APA (7th ed.) Citation

Combs. (2003). Terrorism in the twenty-first century. Prentice Hall.

Chicago Style (17th ed.) Citation

Combs. Terrorism in the Twenty-first Century. New Jersey: Prentice Hall, 2003.

MLA (8th ed.) Citation

Combs. Terrorism in the Twenty-first Century. Prentice Hall, 2003.