APA aipamena

HERSENT OLIVIER. (2005). IP TELEPHONY (2ND ED.). JOHN WILEY AND SONS LTD PUB.

Chicago Style aipamena

HERSENT OLIVIER. IP TELEPHONY. 2ND ED. UK: JOHN WILEY AND SONS LTD PUB, 2005.

MLA aipamena

HERSENT OLIVIER. IP TELEPHONY. 2ND ED. JOHN WILEY AND SONS LTD PUB, 2005.