Osmena, S., Sr. (1973). How Baguio City was born [microform]. Photoduplication Service, University of the Philippines Library.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Osmena, Sergio, Sr. How Baguio City Was Born [microform]. [Quezon City]: Photoduplication Service, University of the Philippines Library, 1973.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Osmena, Sergio, Sr. How Baguio City Was Born [microform]. Photoduplication Service, University of the Philippines Library, 1973.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.