Lua APA (7ú heag.)

ALTER STEVEN. (1999). INFORMATION SYSTEM: A MANAGEMENT PERSPECTIVE (3RD.). MCGRAW-HILL.

Lua i Stíl Chicago (17ú heag.)

ALTER STEVEN. INFORMATION SYSTEM: A MANAGEMENT PERSPECTIVE. 3RD. NEW YORK: MCGRAW-HILL, 1999.

Lua MLA (9ú heag.)

ALTER STEVEN. INFORMATION SYSTEM: A MANAGEMENT PERSPECTIVE. 3RD. MCGRAW-HILL, 1999.

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