The Gentleman's Magazine
Published by F. Jefferies, volume 156 January–June 1834. p. 133 quoting the Letters of Horace Walpole to Sir Horace Mann.
oxforddnb.com
Pittock, Murray G.H., Oxford Dictionary of National Biography, su Elphinstone, Arthur, sixth Lord Balmerino and fifth Lord Coupar (1688–1746), Oxford University Press, 2004. URL consultato il 9 gennaio 2014.
