APA (7 वां संस्करण) प्रशस्ति पत्र

Committee, I. T. a. T. C., Union, I. T., & CCITT Plenary Assembly. (1989). Data communication networks: Open systems interconnection (OSI) protocol specifications, conformance testing (Recommendations X.220 - X.290). Geneva : ITU.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Committee, International Telegraph and Telephone Consultative, International Telecommunication Union, और CCITT Plenary Assembly. Data Communication Networks: Open Systems Interconnection (OSI) Protocol Specifications, Conformance Testing (Recommendations X.220 - X.290). Geneva : ITU, 1989.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Committee, International Telegraph and Telephone Consultative, et al. Data Communication Networks: Open Systems Interconnection (OSI) Protocol Specifications, Conformance Testing (Recommendations X.220 - X.290). Geneva : ITU, 1989.

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