CLELAND, D. I. (1994). Project Management Strategic Design And Implementation David I Clelalnd. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)CLELAND, David I. Project Management Strategic Design And Implementation David I Clelalnd. McGraw-Hill, 1994.
Lua MLA (8ú heag.)CLELAND, David I. Project Management Strategic Design And Implementation David I Clelalnd. McGraw-Hill, 1994.
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