APA استشهاد

Heldman, K. E. (2007). Project management professional exam: Study guide (2nd ed.). Johnwiley.

استشهاد بنمط شيكاغو

Heldman, Kim Etc. Project Management Professional Exam: Study Guide. 2nd ed. New Delhi: Johnwiley, 2007.

MLA استشهاد

Heldman, Kim Etc. Project Management Professional Exam: Study Guide. 2nd ed. Johnwiley, 2007.