APA (7th ed.) Citation

Stoilov, D. (1981). Protected natural sites in the People's Republic of Bulgaria. Sofia Press.

Chicago Style (17th ed.) Citation

Stoilov, Dimităr. Protected Natural Sites in the People's Republic of Bulgaria. [Sofija]: Sofia Press, 1981.

MLA (9th ed.) Citation

Stoilov, Dimităr. Protected Natural Sites in the People's Republic of Bulgaria. Sofia Press, 1981.

Warning: These citations may not always be 100% accurate.