Lua APA (7ú heag.)

HALSALL FRED. (1999). DATA COMMUNICATIONS COMPUTER NETWORK AND OPEN SYSTEMS. ADDISON WESLEY.

Lua i Stíl Chicago (17ú heag.)

HALSALL FRED. DATA COMMUNICATIONS COMPUTER NETWORK AND OPEN SYSTEMS. HARLAW: ADDISON WESLEY, 1999.

Lua MLA (9ú heag.)

HALSALL FRED. DATA COMMUNICATIONS COMPUTER NETWORK AND OPEN SYSTEMS. ADDISON WESLEY, 1999.

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