CLELAND DAVID I. (1984). SYSTEMS ANALYSIS & PROJECT MANAGEMENT (3RD.). MCGRAW-HILL.
Chicago-čujuhus (17. p.)CLELAND DAVID I. SYSTEMS ANALYSIS & PROJECT MANAGEMENT. 3RD. LONDON: MCGRAW-HILL, 1984.
MLA-čujuhus (9. p.)CLELAND DAVID I. SYSTEMS ANALYSIS & PROJECT MANAGEMENT. 3RD. MCGRAW-HILL, 1984.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.