Research methods  the basics 
Nicholas Walliman 
 - 9th.ed. 
 - Boston  Pearson Addison Wesley  c2007. 
 - xvii, 1031 p.  ill. (some col.)  27 cm. 
<br/><br/>Includes index. 
<br/><br/><label>ISBN: </label>0321331796 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics--Study and teaching (Elementary)<br/>Problem solving--Study and teaching (Elementary)