Catholic Church & Catholic Church. National Conference of Catholic Bishops. Bishops' Committee on the Liturgy. (1971). General instruction on the Liturgy of the Hours: With an introduction and survey. National Conference of Catholic Bishops. Committee on the Liturgy.
Παραπομπή σε μορφή Chicago (17η εκδ.)Catholic Church και Catholic Church. National Conference of Catholic Bishops. Bishops' Committee on the Liturgy. General Instruction on the Liturgy of the Hours: With an Introduction and Survey. Washington, D.C.: National Conference of Catholic Bishops. Committee on the Liturgy, 1971.
Παραπομπή σε μορφή MLA (8th εκδ.)Catholic Church και Catholic Church. National Conference of Catholic Bishops. Bishops' Committee on the Liturgy. General Instruction on the Liturgy of the Hours: With an Introduction and Survey. National Conference of Catholic Bishops. Committee on the Liturgy, 1971.