Butterworth, H., & Magalhaes, F. d. (1976). The story of Magellan and the discovery of the Philippines [microform]. Photoduplication Service, University of the Philippines Library.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Butterworth, Hezekiah, و Fernao de Magalhaes. The Story of Magellan and the Discovery of the Philippines [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1976.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Butterworth, Hezekiah, و Fernao de Magalhaes. The Story of Magellan and the Discovery of the Philippines [microform]. Photoduplication Service, University of the Philippines Library, 1976.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.