Holt, J. C. (1963). King John. Routledge.
Lua i Stíl Chicago (17ú heag.)Holt, J. C. King John. Lond.: Routledge, 1963.
Lua MLA (8ú heag.)Holt, J. C. King John. Routledge, 1963.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.