Stackpole Cynthia S. (2010). Users manual to the PMBOK guide. John Wiley & Co.
Chicago Style aipamenaStackpole Cynthia S. Users Manual to the PMBOK Guide. New Jersey: John Wiley & Co, 2010.
MLA aipamenaStackpole Cynthia S. Users Manual to the PMBOK Guide. John Wiley & Co, 2010.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.