Websites 

Art and Science of Leadership - http://www.nwlink.com/~donclark/leader/leader.html

Center for Creative Leadership - http://www.ccl.org/leadership/index.aspx?pageId=1

Free Management Library - http://www.managementhelp.org/ldrship/ldrship.htm

Greenleaf Center for Servant Leadership - http://www.greenleaf.org/

Institute for Business & Professional Ethics (DePaul University) - http://commerce.depaul.edu/ethics/

Leadership Now - http://www.leadershipnow.com

Small Business Leadership from Businessweek.com - http://www.businessweek.com/smallbiz/leadership/

Association Websites

Academy of Management - www.aomonline.org

Administrative Sciences Association of Canada (ASAC) - http://www.asac.ca/

American Society for Training & Development - http://www.astd.org/astd

International Leadership Association (ILA) - http://www.ila-net.org/

Organizational Communication Division (National Communication Association) - http://comm.colorado.edu/nca-orgcomm/

Society for Industrial and Organizational Psychology (American Psychological Association) - http://www.apa.org/about/division/div14.html