Cita APA (7th ed.)
Clancy, T., & Pieczenik, S. Tom Clancy's Op-Center: Balance of Power. Berkley Books.
Cita Chicago (17th ed.)
Clancy, Tom, i Steve Pieczenik. Tom Clancy's Op-Center: Balance of Power. Nueva York, EUA: Berkley Books.
Cita MLA (9th ed.)
Clancy, Tom, i Steve Pieczenik. Tom Clancy's Op-Center: Balance of Power. Berkley Books.
Atenció: Aquestes cites poden no estar 100% correctes.