Coba jelasin Uskup Agung dari Keuskupan Agung Manila dong

Gregory XIII, Pope, 1502–1585. "Bull for erection of the Diocese and Cathedral Church of Manila." In The Philippine Islands, 1493–1898. Cleveland, Ohio: A.H. Clark Company, 1903-9. Vol. 4, 1576–82. Pp. 119–124.