Cita APA (7a ed.)

Francis, D., & Tittel, E. (2005). PMP: Practice questions (1st edition.). Que/Certification.

Cita Chicago Style (17a ed.)

Francis, David, y Ed Tittel. PMP: Practice Questions. 1st edition. [Indianapolis, IN]: Que/Certification, 2005.

Cita MLA (9a ed.)

Francis, David, y Ed Tittel. PMP: Practice Questions. 1st edition. Que/Certification, 2005.