Codex, 7. M. (1992). The basics book of X.25 packet switching. Reading, Mass : Addison-Wesley.
Lua i Stíl Chicago (17ú heag.)Codex, 7341 Motorola. The Basics Book of X.25 Packet Switching. Reading, Mass : Addison-Wesley, 1992.
Lua MLA (9ú heag.)Codex, 7341 Motorola. The Basics Book of X.25 Packet Switching. Reading, Mass : Addison-Wesley, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.