Cita APA (7th ed.)

Phillips, J. J., & Zuniga, L. (2008). Costs and ROI: Evaluating at the ultimate level. Pfeiffer.

Cita Chicago (17th ed.)

Phillips, Jack J., i Lizette Zuniga. Costs and ROI: Evaluating at the Ultimate Level. San Francisco: Pfeiffer, 2008.

Cita MLA (8th ed.)

Phillips, Jack J., i Lizette Zuniga. Costs and ROI: Evaluating at the Ultimate Level. Pfeiffer, 2008.