Peter C. Bower. The Companion to the Book of Common Worship. Office of Theology and Worship, Presbyterian Church (U.S.A.). Վերցված է 2010 թ․ դեկտեմբերի 2-ին. «It apparently emanated from the Lutheran tradition, but it has been appropriated by almost all other traditions.»
Carl Seaburg. Celebrating Christmas: An Anthology. Unitarian Universalist Ministers Association. Վերցված է 2010 թ․ դեկտեմբերի 2-ին. «The use of an Advent Wreath originated a few hundred years ago among Lutherans in Germany.»
