ジョン・カー (初代ロクスバラ公爵)
Henderson, Thomas Finlayson (1892). "Ker, John (d.1741)" . In Lee, Sidney (ed.). Dictionary of National Biography (英語). Vol. 31. London: Smith, Elder & Co. pp. 50–51.
Bayne, Thomas Wilson (1901). "Ker, John (d.1741)" . In Lee, Sidney (ed.). Dictionary of National Biography (1st supplement) (英語). Vol. 3. London: Smith, Elder & Co. p. 60.