Leedy, Paul D. <br/><br/>
Practical research :  planning and design / 
Paul D. Leedy, Jeanne Ellis Ormrod. 
 - 9th ed. 
 - Upper Saddle River, NJ :  Merrill,  c2010 
 - xvii, 336 p. :  28 cm. 
<br/><br/> Original: E-C7/00333  
<br/><br/><label>ISBN: </label>0131365665 9780131365667 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Research
<br/><br/><label>Subjects--Index Terms: </label>Phương pháp nghiên cứu Tri thức 
<br/><br/><label>Dewey Class. No.: </label>001.4