Cita APA (7a ed.)

Udell, J., & O'Reilly, T. (1999). Practical Internet Groupware. O'Reilly.

Cita Chicago Style (17a ed.)

Udell, Jon, y Tim O'Reilly. Practical Internet Groupware. Beijing [etc.]: O'Reilly, 1999.

Cita MLA (9a ed.)

Udell, Jon, y Tim O'Reilly. Practical Internet Groupware. O'Reilly, 1999.