Donaldson, E. T. (1966). Piers Plowman: The C-text and its poet ([New ed.].). Archon Books.
Lua i Stíl Chicago (17ú heag.)Donaldson, Ethelbert Talbot. Piers Plowman: The C-text and Its Poet. [New ed.]. [Hamden, Conn.]: Archon Books, 1966.
Lua MLA (9ú heag.)Donaldson, Ethelbert Talbot. Piers Plowman: The C-text and Its Poet. [New ed.]. Archon Books, 1966.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.