(1987). Gazetteer of Bulgaria: Names approved by the United States Board on Geographic Names (2. ed.). Defense Mapping Agency.
Chicago-Zitierstil (17. Ausg.)Gazetteer of Bulgaria: Names Approved by the United States Board on Geographic Names. 2. ed. Washington, DC: Defense Mapping Agency, 1987.
MLA-Zitierstil (9. Ausg.)Gazetteer of Bulgaria: Names Approved by the United States Board on Geographic Names. 2. ed. Defense Mapping Agency, 1987.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.