Russell Travis. (2007). The IP Multimedia Subsystem (IMS): Session Control and Other Network Operations (In lần thứ 1.). American: McGraw -Hill.
Παραπομπή Chicago StyleRussell Travis. The IP Multimedia Subsystem (IMS): Session Control and Other Network Operations. In lần thứ 1. American: McGraw -Hill, 2007.
Παραπομπή MLARussell Travis. The IP Multimedia Subsystem (IMS): Session Control and Other Network Operations. In lần thứ 1. American: McGraw -Hill, 2007.
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