 
| Type | Valeur | 
|---|---|
| Titre | Historic Earls and Earldoms of Scotland | 
| Personnes | 
|---|
|  MARGARET Buchan Countess of Buchan | 
| Mackintosh, John, 1833-1907. (W. Jolly, Aberdeen. 1898). CHAPTER I. Earldom and Earls of Mar: Page 19 | 
| Available at Internet Archive: https://archive.org/details/peerageofscotlan02douguoft |