Covey, S. R. (2006). The 8th habit personal workbook (1st Free Press trade pbk. ed.). Free Press.
Lua i Stíl Chicago (17ú heag.)Covey, Stephen R. The 8th Habit Personal Workbook. 1st Free Press trade pbk. ed. New York: Free Press, 2006.
Lua MLA (8ú heag.)Covey, Stephen R. The 8th Habit Personal Workbook. 1st Free Press trade pbk. ed. Free Press, 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.