Howell, J. P., & Costley, D. L. (2006). Understanding Behaviors for Effective Leadership (2nd ed.). Prentice-Hall of India Private Limited.
Citazione stile Chigago Style (17a edizione)Howell, Jon P., e Dan L. Costley. Understanding Behaviors for Effective Leadership. 2nd ed. New Delhi: Prentice-Hall of India Private Limited, 2006.
Citatione MLA (9a ed.)Howell, Jon P., e Dan L. Costley. Understanding Behaviors for Effective Leadership. 2nd ed. Prentice-Hall of India Private Limited, 2006.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.