Dyfyniad APA

Minno-geolozhki universitet (Sofia, Bulgaria). Godishnik na Minno-geolozhki︠i︡a universitet, Sofi︠i︡a =: Annual of the Mine and Geology University, Sofia. University.

Dyfyniad Arddull Chicago

Minno-geolozhki universitet (Sofia, Bulgaria). Godishnik Na Minno-geolozhki︠i︡a Universitet, Sofi︠i︡a =: Annual of the Mine and Geology University, Sofia. Sofi︠i︡a: University.

Dyfyniad MLA

Minno-geolozhki universitet (Sofia, Bulgaria). Godishnik Na Minno-geolozhki︠i︡a Universitet, Sofi︠i︡a =: Annual of the Mine and Geology University, Sofia. University.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.