Ehret, W. (1963). The international book of Christmas carols. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Ehret, Walter. The International Book of Christmas Carols. Englewood Cliffs, N.J: Prentice-Hall, 1963.
Lua MLA (9ú heag.)Ehret, Walter. The International Book of Christmas Carols. Prentice-Hall, 1963.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.