Minno-geolozhki universitet (Sofia, Bulgaria). Godishnik na Minno-geolozhki︠i︡a universitet, Sofi︠i︡a =: Annual of the Mine and Geology University, Sofia. University.
Lua i Stíl Chicago (17ú heag.)Minno-geolozhki universitet (Sofia, Bulgaria). Godishnik Na Minno-geolozhki︠i︡a Universitet, Sofi︠i︡a =: Annual of the Mine and Geology University, Sofia. Sofi︠i︡a: University.
Lua MLA (8ú heag.)Minno-geolozhki universitet (Sofia, Bulgaria). Godishnik Na Minno-geolozhki︠i︡a Universitet, Sofi︠i︡a =: Annual of the Mine and Geology University, Sofia. University.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.