Lua APA (7ú heag.)

CLELAND DAVID I. (1984). SYSTEMS ANALYSIS & PROJECT MANAGEMENT (3RD.). MCGRAW-HILL.

Lua i Stíl Chicago (17ú heag.)

CLELAND DAVID I. SYSTEMS ANALYSIS & PROJECT MANAGEMENT. 3RD. LONDON: MCGRAW-HILL, 1984.

Lua MLA (9ú heag.)

CLELAND DAVID I. SYSTEMS ANALYSIS & PROJECT MANAGEMENT. 3RD. MCGRAW-HILL, 1984.

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