Covey, Stephen R..
Great work, great career /
Stephen R. Covey, Jennifer Colosimo 
. - Salt Lake City : FranklinCovey Co.,  2009 
. - 162 p.  tab., schem.  21 cm. 
<br/>К.: Бібліогр. : c. 152-156, Index 
<br/><label>  ISBN: </label>978-1-936111-10-7