Thomas Ignatius Ferreira (c. 1743-1814), Oosgrenspionier en Britse bevelvoerder van Fort Frederick. Historia, [S. l.], v. 35, n. 2, 2021. Disponível em: http://www.jsaa.ac.za/index.php/historia/article/view/1782. Acesso em: 7 nov. 2025.