Certo, S. C., & Certo, S. T. (2009). Modern management: Concepts and skills (11th ed.). Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Certo, Samuel C., agus S. Trevis Certo. Modern Management: Concepts and Skills. 11th ed. Upper Saddle River, NJ ; New Delhi: Prentice Hall, 2009.
Lua MLA (8ú heag.)Certo, Samuel C., agus S. Trevis Certo. Modern Management: Concepts and Skills. 11th ed. Prentice Hall, 2009.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.