Adair, John
Effective leadership : a modern guide to developing leadership skills / John Adair.
Pan Books , 1988
 Buku Teks
Achua, Christopher F.
Effective leadership
South Western Cengage Learning, 2013
 Buku Teks
Punch, Keith F.
Developing effective research proposlas
Sage, 2003
 Buku Teks
Punch, Keith F.
Developing effective research proposlas
Sage Publications, 2008
 Buku Teks
Wellington, Pat
Effective team leadership for engineers
Institute of South East Asia Studies, 2009
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