Original: The Novello Book of Carols. Adam Lay Ybounden. El Cant Des Ocells. Choir sheet music. For Choral. SATB. Music Sales America.
Oversettelse: Den Novello Book of Carols. Choir noter. Den Novello Book of Carols redigert av William Llewellyn. Julen, Choral. 280 sider.