| Columbia Encyclopedia | ... | http://www.bartleby.com/65/ |
| Encarta Online en español | ||
| Enciclonet | ... | http://www.enciclonet.com/portada |
| Enciclopedia Libre Universal | ... | http://enciclopedia.us.es/ |
| Encyclopedia.com | ... | http://www.encyclopedia.com/ |
| Encyclopedia of Life | http://www.eol.org/faq | |
| Encyclopaedia of the Orient | ... | http://i-cias.com/e.o/ |
| Enciclopedia Católica | ... | http://www.enciclopediacatolica.com/ |
| Encyclopedia Astronáutica | ... | http://www.astronautix.com/ |
| HealthCentral Encyclopedia | ... | http://www.healthcentral.com/home/home.cfm |
| Instrument Encyclopedia | ... | http://www.si.umich.edu/chico/instrument/ |
| Planthogar.Net | ... | http://www.planthogar.net/ |
| Webopedia | ... | http://www.webopedia.com |
| Wikipedia - Enciclopedia Libre | ... | http://es.wikipedia.org/ |
| Wikilengua del español | http://www.wikilengua.org/ |