Cita APA (7a ed.)

Landis, M. M., Lloyd, R. A., & England, W. (2010). The 3CX IP PBX tutorial: Develop a fully functional, low cost, professional PBX phone system using 3CX. Packt Pub..

Cita Chicago Style (17a ed.)

Landis, Matthew M., Robert A. Lloyd, y William England. The 3CX IP PBX Tutorial: Develop a Fully Functional, Low Cost, Professional PBX Phone System Using 3CX. Birmingham, U.K.: Packt Pub., 2010.

Cita MLA (8a ed.)

Landis, Matthew M., et al. The 3CX IP PBX Tutorial: Develop a Fully Functional, Low Cost, Professional PBX Phone System Using 3CX. Packt Pub., 2010.