APA (7th ed.) Citation

WARD, J. L., & Levin, G. (2017). PMP exam challenge! (6th ed.). CRC Press.

Chicago Style (17th ed.) Citation

WARD, J. LEROY, and Ginger Levin. PMP Exam Challenge! 6th ed. [Place of publication not identified]: CRC Press, 2017.

MLA (9th ed.) Citation

WARD, J. LEROY, and Ginger Levin. PMP Exam Challenge! 6th ed. CRC Press, 2017.