Holladay, V. D. (2003). Education requirements for private security professionals.
Cita Chicago Style (17a ed.)Holladay, Van Dale. Education Requirements for Private Security Professionals. 2003.
Cita MLA (8a ed.)Holladay, Van Dale. Education Requirements for Private Security Professionals. 2003.
Precaución: Estas citas no son 100% exactas.