|←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