Haiduk, H. Paul.  <br/><br/>
Wordperfect-5.1, Lotus 1-2-3-2.2, dBASE III Plus.   

 - 1a edición 
 - Madrid   McGraw-Hill  1993 
<br/><br/><label>ISBN: </label>847615836X     
<br/><br/><label>Dewey Class. No.: </label>001.6425 H149w