APA (7th ed.) Citation

Ovsjannikov, O. V. (1971). O zamkach "bolgarskogo tipa".

Chicago Style (17th ed.) Citation

Ovsjannikov, O. V. O Zamkach "Bolgarskogo Tipa". 1971.

MLA (9th ed.) Citation

Ovsjannikov, O. V. O Zamkach "Bolgarskogo Tipa". 1971.

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