The 7 habits of highly effective people
Covey Stephen R.Kniha
Citace v seznamu literatury:
COVEY, Stephen R. The 7 habits of highly effective people: restoring the character ethic. [Rev. ed.]. New York: Free Press, c2004. ISBN 0743269519. Dostupné také z: http://www.loc.gov/catdir/description/simon051/2004057494.html.