(perhaps) Baldwin, William, A Mirror for Magistrates (1559)

(perhaps) Chronicque de la Traïson et Mort de Richart Deux Roy Dengleterre (MS., c. 1400).

(perhaps) Créton, Jean. Histoire du Roy d'Angleterre Richard (MS, wr. c.1399).

Daniel, Samuel. The First Four Books of the Civil Wars Between the Two Houses of Lancaster and York (1595).

(perhaps) Froissart, Jean. The Chronicles of England, France... [etc.]. Trans. Lord Berners (1523).

(perhaps) Hall, Edward. The Union of the Two Noble and Illustrate Families of Lancaster and York (1548).

Holinshed, Raphael. The Chronicles of England, Scotland and Ireland (1577). 1587 edtn.

1 Richard II, or Thomas Of Woodstock (play, perf. 1592).

REFERENCE : Charles R. Forker, ed. Richard II. The Arden Shakespeare. London: Thomson, 2002. 123-165.