Šaltiniai kitose interneto svetainėse

vatican.va: Congregazione per il Culto Divino e la Disciplina dei Sacramenti

cultodivino.va: Congregazione per il Culto Divino e la Disciplina dei Sacramenti

Šaltiniai lietuvių kalba

EIS.KATALIKAI.LT – Liturgija

Šaltiniai kitomis kalbomis

ccwatershed.org
ORDO LECTIONUM MISSAE PDF (Editio Typica altera)

musicasacra.com
MISSALE ROMANUM (Editio Typica tertia) PDF (scanned to PDF)

United States Conference of Catholic Bishops (USCCB)
General Instruction Of The Roman Missal (2011 U.S.)

Global Catholic Network (EWTN) Library
General Instruction of the Roman Missal (1975 U.S.)
General Norms For Tthe Liturgical Year and The Calendar (14 february 1969)

The Catholic Church Of England and Wales. Liturgy Office
General Instruction of the Roman Missal PDF (2011)
Lectionary for Mass – Introduction PDF (resent)
Universal Norms on the Liturgical Year and the General Roman Calendar PDF (resent)

Gcatcholic.org – Documents tagged with liturgy 

archive.org – Calendarium Romanum (1969) MANY FORMATS 

www.ceremoniaire.net
Depuis 1969 – la liturgie rénovée*
Institutio generalis Missalis romani – Présentation générale du Missel romain 2002  (dvikalbis)
Normes universelles de l'Année liturgique et du Calendrier (2002)

ROMAN LITURGY 
Ordo Missæ 2002 (XML -> HTM)

LA CHIESA 

Chiesa Cattolica Italiana (Sitto Oficiale della Conferenza Episcopale Italiana) 

liturgia.it

www.maranatha.it

Liturgické texty - Knihovna pražké metropolitní kapituly 

SANTI, BEATI E TESTIMONI
catholicsaints.info
www.liturgies.net/saints

it.wikipedia.org/wiki/Anno_liturgico_nella_Chiesa_latina

Kalendoriai

Calendarium Romanum Generale

universalis.com