Black, U. (1997). ISDN and SS7: Architecture for digital signaling networks. Upper Saddle River, NJ: Prentice-Hall.
Dyfyniad Arddull ChicagoBlack, Uyless. ISDN and SS7: Architecture for Digital Signaling Networks. Upper Saddle River, NJ: Prentice-Hall, 1997.
Dyfyniad MLABlack, Uyless. ISDN and SS7: Architecture for Digital Signaling Networks. Upper Saddle River, NJ: Prentice-Hall, 1997.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.