Zar'a Ya'qob <Aethiopien, K. (1991). The epistle of humanity. Peeters.
Lua i Stíl Chicago (17ú heag.)Zar'a Ya'qob <Aethiopien, Kaiser>. The Epistle of Humanity. Lovanii: Peeters, 1991.
Lua MLA (8ú heag.)Zar'a Ya'qob <Aethiopien, Kaiser>. The Epistle of Humanity. Peeters, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.