Henning Edward. (2009). Fast Track to security. G G Interactive.
Cita Chicago (17th ed.)Henning Edward. Fast Track to Security. [s.l]: G G Interactive, 2009.
Cita MLA (9th ed.)Henning Edward. Fast Track to Security. G G Interactive, 2009.
Atenció: Aquestes cites poden no estar 100% correctes.