Research methods for public administrators 
Elizabethann O'Sullivan. 
 - 4th edition. 
 -  Addison Wesley Longman.  2003 
 - xiv, 498 p. 
0-321-08558-2
Public administration -- Research -- Methodology.
GS 351.072 O85 2003
                        0-321-08558-2
Public administration -- Research -- Methodology.
GS 351.072 O85 2003