Sherfield, Robert M. <br/><br/>
Cornerstone :  your foundation for discovering your potential, learning actively, and living well / 
Robert M. Sherfield, Rhonda J. Montgomery, Patricia J. Moody. 
 - 5th ed. 
 - Upper Saddle River, N.J. :  Pearson Prentice Hall,  c2008. 
 - xx, 364 p. :  ill. (chiefly col.) ;  28 cm.