Gayre of Gayre and Nigg, G. R. (1956). The heraldry of the Knights of St. John. Garga.
Chicago-Zitierstil (17. Ausg.)Gayre of Gayre and Nigg, George Robert. The Heraldry of the Knights of St. John. Allahabad: Garga, 1956.
MLA-Zitierstil (8. Ausg.)Gayre of Gayre and Nigg, George Robert. The Heraldry of the Knights of St. John. Garga, 1956.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.