Focus on grammar :  An integrated skills approach: Workbook / 
Marjorie Fuchs. 
 - 3rd ed. 
 - White Plains, NY :  Pearson Longman,  c2006. 
 - v.  :  ill. ;  28 cm. +  1 sound disc (digital ; 4 3/4 in.) 
<br/><br/><label>ISBN: </label>0131899848 (v. 3 : student book : alk. paper) 
<br/><br/><label>LCCN: </label>2005007655 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English language--Textbooks for foreign speakers.<br/>English language--Grammar--Problems, exercises, etc.