University of the Philippines. Library & University of the Philippines. (1980). Library union catalog of Filipiniana population materials. University of the Philippines Library.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)University of the Philippines. Library و University of the Philippines. Library Union Catalog of Filipiniana Population Materials. Quezon City: University of the Philippines Library, 1980.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)University of the Philippines. Library و University of the Philippines. Library Union Catalog of Filipiniana Population Materials. University of the Philippines Library, 1980.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.