Guia F. Constantino & Romarico M. Barrientos,  2016. <br/><br/>
Modern Business English :  Correspondence in the Corporate World / 
Guia F. Constantino & Romarico M. Barrientos. 
 - Manila, Philippines :  Mindshapers Co., Inc,  2016. 
<br/><br/><label>ISBN: </label>978-621-406-0382