Gray, C. F. (2003). Project management: The managerial process (ada cd). McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Gray, Clifford F. Project Management: The Managerial Process (ada Cd). McGraw-Hill, 2003.
Lua MLA (8ú heag.)Gray, Clifford F. Project Management: The Managerial Process (ada Cd). McGraw-Hill, 2003.
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