APA ציטוט

Covey, S. R. (1997). The 7 habits of highly effective people. Franklin Covey.

Chicago Style (17th ed.) Citation

Covey, Stephen R. The 7 Habits of Highly Effective People. North Provo, Utah: Franklin Covey, 1997.

ציטוט MLA

Covey, Stephen R. The 7 Habits of Highly Effective People. Franklin Covey, 1997.