DRUMMOND, James. Notes on some of the Ancient Monuments of Iona. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 10, p. 215–217, 1873. DOI: 10.9750/PSAS.010.215.217. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/5662. Acesso em: 5 may. 2024.