Stackpole Cynthia S. (2010). Users manual to the PMBOK guide. John Wiley & Co.
Lua i Stíl Chicago (17ú heag.)Stackpole Cynthia S. Users Manual to the PMBOK Guide. New Jersey: John Wiley & Co, 2010.
Lua MLA (9ú heag.)Stackpole Cynthia S. Users Manual to the PMBOK Guide. John Wiley & Co, 2010.
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