DNB in VIAF 29 Sep. 2012 (Oldcastle, John 1378-1417)
LC data base, 4/24/84 (hdg.: Oldcastle, John, Sir, styled Lord Cobham, d. 1417) LC manual auth. cd. (variants: Syr Jhoñ Oldcastell; John Oldecastell; Sir John Oldcastell)
Sir John Oldcastle. A critical edition of I Sir John Oldcastle, 1984 CIP t.p. (Sir John Oldcastle) frt. mtr. (Sir John Old-castle)