Adair, John
Effective leadership : a modern guide to developing leadership skills
Pan Books , 1988
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Achua, Christopher F.
Effective leadership
South Western Cengage Learning, 2013
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Punch, Keith F.
Developing effective research proposlas
Sage, 2003
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Punch, Keith F.
Developing effective research proposlas
Sage Publications, 2008
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Howell, Jon P.
Understanding behaviors for effective leadership
Prentice-Hall, 2001
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