Keat, P. G., Young, P. K. Y., & Banerjee, S. (2011). Managerial economics: Economic tools for today's decision makers (6th ed.). Prentice Hall ; Pearson.

Keat, Paul G., Philip K. Y. Young, and Sreejata Banerjee. Managerial Economics: Economic Tools for Today's Decision Makers. 6th ed. Upper Saddle River, N.J. : Delhi: Prentice Hall ; Pearson, 2011.

Keat, Paul G., et al. Managerial Economics: Economic Tools for Today's Decision Makers. 6th ed. Prentice Hall ; Pearson, 2011.