John B. Hattendorf: Savage, Richard, fourth Earl Rivers (c. 1654–1712), army officer and politician. In: Henry Colin Gray Matthew, Brian Harrison (Hrsg.): Oxford Dictionary of National Biography, from the earliest times to the year 2000 (ODNB). Oxford University Press, Oxford 2004, ISBN 0-19-861411-X (doi:10.1093/ref:odnb/24723 Lizenz erforderlich), Stand: 2004
Arthur Sherbo: Brett [née Mason], Anne [other married name Anne Gerard, countess of Macclesfield] (1667/68 – 1753), courtier mistress of George I. In: Henry Colin Gray Matthew, Brian Harrison (Hrsg.): Oxford Dictionary of National Biography, from the earliest times to the year 2000 (ODNB). Oxford University Press, Oxford 2004, ISBN 0-19-861411-X (doi:10.1093/ref:odnb/70843 Lizenz erforderlich), Stand: 2004