APA (7th ed.) Citation

Rilakloster. (1989). Rila monastery. Sofia Press.

Chicago Style (17th ed.) Citation

Rilakloster. Rila Monastery. Sofia: Sofia Press, 1989.

MLA (9th ed.) Citation

Rilakloster. Rila Monastery. Sofia Press, 1989.

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