Cita APA (7th ed.)

BROWN KEVIN. (2004). IP TELEPHONY UNVEILED. PEARSON EDUCATION.

Cita Chicago (17th ed.)

BROWN KEVIN. IP TELEPHONY UNVEILED. ENGLAND: PEARSON EDUCATION, 2004.

Cita MLA (9th ed.)

BROWN KEVIN. IP TELEPHONY UNVEILED. PEARSON EDUCATION, 2004.