VAN VACTOR, Lloyd. FOUR DECADES OF AMERICAN EDUCATORS IN MINDANAO AND SULU. Mindanao Journal, [S. l.], v. 8, n. 1,2,3,4, p. 225–252, 2026. Disponível em: https://msu-mindanaojournal.com/index.php/ojs/article/view/249.. Acesso em: 6 mar. 2026.