Black, U. (1997). ISDN and SS7: Architecture for digital signaling networks. Upper Saddle River, NJ: Prentice-Hall.
शिकागो स्टाइल उद्धरणBlack, Uyless. ISDN and SS7: Architecture for Digital Signaling Networks. Upper Saddle River, NJ: Prentice-Hall, 1997.
एमएलए उद्धरणBlack, Uyless. ISDN and SS7: Architecture for Digital Signaling Networks. Upper Saddle River, NJ: Prentice-Hall, 1997.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.