Duke of Suffolk
| Author(s) | Title | Reference | |
|---|---|---|---|
| K.B. McFarlane | Historical Poems of the XIVth and XVth Centuries, by Rossell Hope Robbins | 30/1, p. 57 | |
| Norman Davis | A Book of London English 1384-1425, by R. W. Chambers, Marjorie Daunt, M. M. Weale | 40/1, p. 75 |