APA (7th ed.) Citation
Bulgaria. Ministers of the People 's Republic. Committe on Environmental Protection & Sofia Press. (1981). Protected natural sites in the People 's Republic of Bulgaria. Sofia Press.
Chicago Style (17th ed.) Citation
Bulgaria. Ministers of the People 's Republic. Committe on Environmental Protection and Sofia Press. Protected Natural Sites in the People 'S Republic of Bulgaria. Sofia Press, 1981.
MLA (9th ed.) Citation
Bulgaria. Ministers of the People 's Republic. Committe on Environmental Protection and Sofia Press. Protected Natural Sites in the People 'S Republic of Bulgaria. Sofia Press, 1981.
Warning: These citations may not always be 100% accurate.