Constitution on the Sacred Liturgy
General Instruction of the Roman Missal
https://www.usccb.org/prayer-and-worship/the-mass/general-instruction-of-the-roman-missal
The General Instruction on the Liturgy of the Hours
https://www.ewtn.com/catholicism/library/general-instruction-on-the-liturgy-of-the-hours-2175
Sing to the Lord
https://stcdio.org/wp-content/uploads/2013/03/Sing-to-the-Lord.pdf
Built of Living Stone
https://nyliturgy.org/wp-content/uploads/BOLS.pdf
DESIDERIO DESIDERAVI: ON THE LITURGICAL FORMATION OF THE PEOPLE OF GOD