A study on the application of Herzberg's two factor theory in the department of police 
Buddhadasa,L.H.A.D.P. 
 -  2009. 
 - ix,79p.: 
<br/><br/> Kamaladasa, N., & Amaragunasekara, S.D.L. 
<br/><br/><label>Gov. Doc. Class. No.: </label>MPM/T/54