APA (7th ed.) Citation

Ward, J. L., & Levin, G. (2013). PMP exam challenge! (Sixth edition.). Auerbach.

Chicago Style (17th ed.) Citation

Ward, J. LeRoy, and Ginger Levin. PMP Exam Challenge! Sixth edition. Boca Raton, Florida: Auerbach, 2013.

MLA (9th ed.) Citation

Ward, J. LeRoy, and Ginger Levin. PMP Exam Challenge! Sixth edition. Auerbach, 2013.