Philippine Islands. Military Governor, 1898-1899 (Elwell S. Otis), & Otis, E. S. (1979). Report of Major-General E.S. Otis on military operations and civil affairs in the Philippine Islands [microform]. Photoduplication Service, University of the Philippines Library.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Philippine Islands. Military Governor, 1898-1899 (Elwell S. Otis), و Elwell Stephen Otis. Report of Major-General E.S. Otis on Military Operations and Civil Affairs in the Philippine Islands [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1979.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Philippine Islands. Military Governor, 1898-1899 (Elwell S. Otis), و Elwell Stephen Otis. Report of Major-General E.S. Otis on Military Operations and Civil Affairs in the Philippine Islands [microform]. Photoduplication Service, University of the Philippines Library, 1979.