- Het SMART principe
nl.wikipedia.org/wiki/SMART-principe - SMART goals
www.projectsmart.co.uk/smart-goals.php - SMART goals
www.toolshero.com/time-management/smart-goals/ - Creating SMART goals
topachievement.com/smart.html - The essential guide to writing SMART goals
www.smartsheet.com/blog/essential-guide-writing-smart-goals