 
| Type | Valeur | 
|---|---|
| Titre | Peter I de Brus, "Find A Grave Index" | 
| "Find A Grave Index," database, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:QV2Y-BQCY : 11 June 2020), Peter I de Brus, 1222; Burial, , ; citing record ID , Find a Grave, http://www.findagrave.com. |