HUMAN RESOURCES AND PERSONNEL MANAGEMENT   FOURTH EDITION  
WILLIAM B. WERTHER, JR. Y  KEITH DAVIS, PH. 
 - NEY YORK, ST. LOUIS, SAN FANCISCO, AUCKLAND, BOGOTA, CARACAS, LISBON, LONDON, MADRID, MEXICO, MILAN, MONTREAL, NEW DELHI, PARIS, SAN JUAN, SINGAPOUR, SYDNEY, TOKYO, TORONTO