Babayan, J. <br/><br/>
All about tenses / 
J. Babayan, V. Avagyan; "Interlingua" Linguistic University. 
 - Yerevan :  Zangak-97,  2006. 
 - 286 p. :  tabl. ;  20 cm. 
<br/><br/><label>ISBN: </label>9994111264 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English--Manual