APA
Combs C. C., . (1997). Terrorism in the twenty-first century. New Jersey: Prentice-Hall.
Chicago
Combs Cindy C, . 1997. Terrorism in the twenty-first century. New Jersey: Prentice-Hall.
Harvard
Combs C. C., . (1997). Terrorism in the twenty-first century. New Jersey: Prentice-Hall.
MLA
Combs Cindy C, . Terrorism in the twenty-first century. New Jersey: Prentice-Hall. 1997.