APA (7th ed.) Citation
Covey, S. R. (2005). <The> 7 habits of highly effective people: Personal workbook. Simon & Schuster.
Chicago Style (17th ed.) Citation
Covey, Stephen R. <The> 7 Habits of Highly Effective People: Personal Workbook. London: Simon & Schuster, 2005.
MLA (9th ed.) Citation
Covey, Stephen R. <The> 7 Habits of Highly Effective People: Personal Workbook. Simon & Schuster, 2005.
Warning: These citations may not always be 100% accurate.