BELL, Walter Leonard. Notes on a Portrait at Abbotsford. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 59, p. 224–231, 1925. DOI: 10.9750/PSAS.059.224.231. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/7621. Acesso em: 5 may. 2024.