Cita APA (7th ed.)

Udell, J. (1999). Practical Internet groupware. O'Reilly.

Cita Chicago (17th ed.)

Udell, Jon. Practical Internet Groupware. Sebastopol, California: O'Reilly, 1999.

Cita MLA (9th ed.)

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