Manwal sa korespondensya opisyal 

 - 1st  Edition 
 - Manila :  National Book Store.  1990. 
 - xxvi, 364 pages :  23 cm. 
<br/><br/><label>ISBN: </label>8705031 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Commercial correspondence--Handbooks, manuals, etc. <br/>Letter writing--Handbooks, manuals, etc. 
<br/><br/><label>Dewey Class. No.: </label>651.75   / M319