Howell, J. P., & Costley, D. L. (2006). Understanding behaviors for effective leadership (2nd ed.). Pearson/Prentice Hall.
Čikaški stil citiranja (17. izdanje)Howell, Jon P., i Dan L. Costley. Understanding Behaviors for Effective Leadership. 2nd ed. Upper Saddle River, N.J. ; New Delhi: Pearson/Prentice Hall, 2006.
MLA način citiranja (8. izdanje)Howell, Jon P., i Dan L. Costley. Understanding Behaviors for Effective Leadership. 2nd ed. Pearson/Prentice Hall, 2006.
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