Certo, S. C. (1997). Modern management: Diversity, quality, ethics, and the global environment (7th ed.). Prentice Hall.

Certo, Samuel C. Modern Management: Diversity, Quality, Ethics, and the Global Environment. 7th ed. Upper Saddle River, N.J.: Prentice Hall, 1997.

Certo, Samuel C. Modern Management: Diversity, Quality, Ethics, and the Global Environment. 7th ed. Prentice Hall, 1997.