SOURCE-09281Research NeededProbable
Mackay, A.J.G. "Bruce, Robert (1274-1329)" in the Dictionary of National Biograp...
Full citation
Mackay, A.J.G. "Bruce, Robert (1274-1329)" in the Dictionary of National Biography. (London, UK: Smith, Elder & Co., 1908), vol. 7. Online at [https://en.wikisource.org/wiki/Bruce,_Robert_(1274-1329)_(DNB00) Wikisource.