Codex, 7. M. (1992). The basics book of X.25 packet switching. Reading, Mass : Addison-Wesley.
Cita Chicago (17th ed.)Codex, 7341 Motorola. The Basics Book of X.25 Packet Switching. Reading, Mass : Addison-Wesley, 1992.
Cita MLA (9th ed.)Codex, 7341 Motorola. The Basics Book of X.25 Packet Switching. Reading, Mass : Addison-Wesley, 1992.
Atenció: Aquestes cites poden no estar 100% correctes.