420 <br/>
          Focus 3 : Workbook 11th grade 
  
 - 2 ed 
.- Ulaanbaatar :, 2020., 
.- 175 pages ;,  30 sm. 
-ISBN 9781292234021 
<br/> - Special Edition for Mongolia 
<br/><br/><label>Тавиурын заалт: </label>420