Butler, A. (1967). A history of the Order of the Hospital of St. John of Jerusalem: General editor: Lionel Butler. Macmillan [u.a.].
Lua i Stíl Chicago (17ú heag.)Butler, A.S. A History of the Order of the Hospital of St. John of Jerusalem: General Editor: Lionel Butler. London: Macmillan [u.a.], 1967.
Lua MLA (8ú heag.)Butler, A.S. A History of the Order of the Hospital of St. John of Jerusalem: General Editor: Lionel Butler. Macmillan [u.a.], 1967.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.