For the most reliable and "fixed" versions (complete with official chords and lyrics), it is best to use authorized distributors. JesCom Philippines : The official publisher (Jesuit Music Ministry) offers the Bayan Umawit Chord Book

Many local dioceses and parish websites host "Choir Resources" sections.

The most reliable source is the Catholic Bishops' Conference of the Philippines (CBCP) or the Jesuit Music Ministry (JMM) .

Songs are organized chronologically, covering Advent, Christmas, Lent, Easter, Pentecost, Ordinary Time, and various Sacraments.

and Claretian Communications. It is widely used in Catholic communities across the Philippines and abroad for Mass and other religious services. Understanding the Songbook

(Please ensure you obtain the PDF from a legitimate and authorized source to support the creators and rights holders of the music.)