de Leon, R. T. (1976). The political elites of Cagayan province a study of Dupaya dominance in Cagayan. Animo Repository.
استشهاد بنمط شيكاغوde Leon, Ramon Trinidad. The Political Elites of Cagayan Province a Study of Dupaya Dominance in Cagayan. Animo Repository, 1976.
MLA استشهادde Leon, Ramon Trinidad. The Political Elites of Cagayan Province a Study of Dupaya Dominance in Cagayan. Animo Repository, 1976.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.