APA
Khristov K. A., . (1980). Bulgaria, 1300 years. Sofia: Sofia Press.
Chicago
Khristov Khristo Angelov, . 1980. Bulgaria, 1300 years. Sofia: Sofia Press.
Harvard
Khristov K. A., . (1980). Bulgaria, 1300 years. Sofia: Sofia Press.
MLA
Khristov Khristo Angelov, . Bulgaria, 1300 years. Sofia: Sofia Press. 1980.
