Wright, Thomas,
ed.
Specimens of Old Christmas Carols, etc.
Percy Society
4. London: T. Richard, 1841: 2-3.
Wright, Thomas,
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Songs and Carols.
Warton Club
4. London: Richards, 1856: 78-9.
Greene, Richard Leighton.
The Early English Carols.
Oxford: Clarendon, 1935; 2nd ed., rev., Oxford: Clarendon,
1977: 11-2; 1977, 8.