CALLENDER, Henry. Notice of the Stone Circle at Callernish, in the Island of Lewis. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 2, p. 380–384, 1859. DOI: 10.9750/PSAS.002.380.384. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/4450. Acesso em: 6 may. 2024.