SOMMERVILLE, J E. Notice of an ancient Structure called ’The Altar’ in the Island of Canna. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 33, p. 133–140, 1899. DOI: 10.9750/PSAS.033.133.140. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/6733. Acesso em: 6 may. 2024.