Ledford Jerri L. <br/><br/>
Search engine optimization/ 
Jerri L.Ledford 
 - 2nd ed. 
 - Ontario;  Wiley Publishers,  2009. 
 - xx,507p.; 
<br/><br/> includes index 
<br/><br/><label>ISBN: </label>9780470452646 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Search engine
<br/><br/><label>LC Class. No.: </label>HF5415.1265 .L43 2009