APA (7th ed.) Zitazioa
Heldman, K. (2002). PMP: Project management professional study guide. SYBEX.
Chicago Style (17th ed.) Zitazioa
Heldman, Kim. PMP: Project Management Professional Study Guide. Alameda, CA: SYBEX, 2002.
MLA (9th ed.) Zitazioa
Heldman, Kim. PMP: Project Management Professional Study Guide. SYBEX, 2002.
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