|←Author Index: Ar||John Armstrong
|Scottish poet, s. of the minister of Castleton, Roxburghshire, studied medicine, which he practised in London|
- "Armstrong, John, M.D.," in A Short Biographical Dictionary of English Literature, by John William Cousin, London: J. M. Dent & Sons (1910)
- "Armstrong, John (physician)," in Encyclopædia Britannica (11th ed., 1911)
- "Armstrong, John, M.D.," in A biographical dictionary of eminent Scotsmen, (ed.) by Thomas Thomson, Glasgow: Blackie and Son (1857, 2nd edition) in 9 vols.
- "Armstrong, John (1709-1779)," in Dictionary of National Biography, London: Smith, Elder, & Co., (1885–1900) in 63 vols.