Siazon-Lorenzo, Carmelita <br/><br/>
Korespondensya opisyal at pagsulat ng ulat sa Wikang Filipino / 
Carmelita Siazon-Lorenzo, Diosdado F. Cruz. 
 - Quezon City :  Katha Pub. Co,  c1997. 
 - 189 p. 
<br/><br/><label>ISBN: </label>971574-003-0 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Filipino language--Technical Filipino<br/>Letter-writing, Filipino