Hayden, J. R. (1977). Constitutional and political development in the Philippine Islands, 1921-1925 [microform]. Photoduplication Service, University of the Philippines Library.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Hayden, Joseph Ralston. Constitutional and Political Development in the Philippine Islands, 1921-1925 [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1977.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Hayden, Joseph Ralston. Constitutional and Political Development in the Philippine Islands, 1921-1925 [microform]. Photoduplication Service, University of the Philippines Library, 1977.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.