Cita APA (7th ed.)
Abrahams, J. R., & Lollo, M. (2003). Centrex or PBX: The impact of IP. Artech House.
Cita Chicago (17th ed.)
Abrahams, John R., i Mauro Lollo. Centrex or PBX: The Impact of IP. Boston: Artech House, 2003.
Cita MLA (9th ed.)
Abrahams, John R., i Mauro Lollo. Centrex or PBX: The Impact of IP. Artech House, 2003.
Atenció: Aquestes cites poden no estar 100% correctes.