Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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