Erlikh, Ḥ. (1973). A political biography of Ras Alula, 1875-1897. University of London.
Lua i Stíl Chicago (17ú heag.)Erlikh, Ḥagai. A Political Biography of Ras Alula, 1875-1897. University of London, 1973.
Lua MLA (8ú heag.)Erlikh, Ḥagai. A Political Biography of Ras Alula, 1875-1897. University of London, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.