Heldman, K. (2016). PMP: Project management professional exam : study guide (Eighth edition.). Sybex, a Wiley brand.
芝加哥风格引文Heldman, Kim. PMP: Project Management Professional Exam : Study Guide. Eighth edition. Indianapolis, Indiana: Sybex, a Wiley brand, 2016.
MLA引文Heldman, Kim. PMP: Project Management Professional Exam : Study Guide. Eighth edition. Sybex, a Wiley brand, 2016.
警告：这些引文格式不一定是100％准确.