Heldman, K. (2002). PMP: Project management professional study guide. SYBEX.
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Chicago-čujuhus (17. p.)
Heldman, Kim. PMP: Project Management Professional Study Guide. Alameda, CA: SYBEX, 2002.
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MLA-čujuhus (9. p.)
Heldman, Kim. PMP: Project Management Professional Study Guide. SYBEX, 2002.
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