| Clue | Source | Date |
|---|---|---|
| Worthy of reference | New York Times | 23 Sep 2016 |
| Worthy of reference | ||
| Worthy of inclusion in a bibliography | Wall Street Journal | 26 Dec 2015 |
| That can be summoned to appear in court | The Telegraph General Knowledge | 20 Sep 2015 |
| Worthy of inclusion in a bibliography | ||
| Quoteworthy |