APA (7e ed.) Bronvermelding

Combs, C. C. (2000). Terrorism in the twenty-first century (2nd ed.). Prentice Hall.

Chicago (17e ed.) Bronvermelding

Combs, Cindy C. Terrorism in the Twenty-first Century. 2nd ed. Upper Saddle River, N.J: Prentice Hall, 2000.

MLA (9e ed.) Bronvermelding

Combs, Cindy C. Terrorism in the Twenty-first Century. 2nd ed. Prentice Hall, 2000.