Citazione APA

 Harrell, K. (2003).  The attitude of leadership: Taking the lead and keeping it.  Wiley.

Stile di citazione Chicago

 Harrell, Keith.  The Attitude of Leadership: Taking the Lead and Keeping It.  Wiley, 2003.

Citazione MLA

 Harrell, Keith.  The Attitude of Leadership: Taking the Lead and Keeping It.  Wiley, 2003.

Attenzione: Queste citazioni potrebbero non essere precise al 100%.