Enciclopedia puertorriqueña siglo XXI. 

 - 3. ed. revisada : 2000. 
 - Santurce, P.R.  Caribe Grolier  2000. 
 - 6 v.  ill., maps  27 cm. 
<br/><br/><label>ISBN: </label>0717251640 
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Puerto Rico--Dictionaries and encyclopedias.<br/>Puerto Rico--History.
<br/><br/><label>LC Class. No.: </label>AE 65  / .N8 2000