Mutua,R W ,S.J. Omulanda nad J.E. Otiende <br/><br/>
Study and communication skills 

 - Macmillan  London  1992 
<br/><br/><label>ISBN: </label>0-333-51009-7 
<br/><br/><label>LC Class. No.: </label>LB 1049   / M88 1992