HERSENT OLIVIER. (2005). IP TELEPHONY (2ND ED.). JOHN WILEY AND SONS LTD PUB.
Chicagoスタイル(17版)引用形式HERSENT OLIVIER. IP TELEPHONY. 2ND ED. UK: JOHN WILEY AND SONS LTD PUB, 2005.
MLA(9版)引用形式HERSENT OLIVIER. IP TELEPHONY. 2ND ED. JOHN WILEY AND SONS LTD PUB, 2005.
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