APA (7th ed.) Citation

(1987). Gazetteer of Bulgaria: Names approved by the United States Board on Geographic Names (2. ed.). Defense Mapping Agency.

Chicago Style (17th ed.) Citation

Gazetteer of Bulgaria: Names Approved by the United States Board on Geographic Names. 2. ed. Washington, DC: Defense Mapping Agency, 1987.

MLA (9th ed.) Citation

Gazetteer of Bulgaria: Names Approved by the United States Board on Geographic Names. 2. ed. Defense Mapping Agency, 1987.