| Answer | Crossword Clue |
|---|---|
| WIKIPEDIA | Online reference source |
| SITEMAP | Online reference |
| ENCARTA | Bygone online reference |
| WIKI | Collaborative online reference |
| WIKIPEDIA | Popular online reference |
| WIKI | User-edited online reference |
| WIKI | Popular online reference, for short |
| URBANDICTIONARY | "Define your world" online reference |
| WOOKIEEPEDIA | Online reference for all things "Star Wars" |
| ASKAN | ... Engineer (M.I.T. online reference service) |
