Wright, Thomas,
ed.
Songs and Carols.
Warton Club
4. London: Richards, 1856: 106-7.
Chambers, Edmund Kerchever, and Frank Sidgwick.
Early English Lyrics….
London: Buller, 1907, 1911 et seq: 198.
Greene, Richard Leighton.
The Early English Carols.
Oxford: Clarendon, 1935; 2nd ed., rev., Oxford: Clarendon,
1977: 263-4; 1977, 233-4.
Segar, Mary Gertrude,
ed.
A Mediaeval Anthology.
London, NY: Longmans, Green, 1915: 108.
Greene, Richard Leighton,
ed.
A Selection of English Carols.
Clarendon Medieval and Tudor Series.
Oxford: Clarendon, 1962: 142.