Cita APA (7a ed.)

Combs, C. C. (2007). Terrorism in the twenty-first century (4. ed.). Prentice Hall.

Cita Chicago Style (17a ed.)

Combs, Cynthia C. Terrorism in the Twenty-first Century. 4. ed. Upper Saddle River, NJ: Prentice Hall, 2007.

Cita MLA (9a ed.)

Combs, Cynthia C. Terrorism in the Twenty-first Century. 4. ed. Prentice Hall, 2007.