Petkov, K. (2008). The voices of medieval Bulgaria, seventh-fifteenth century: The records of a bygone culture. Brill.
Citación estilo ChicagoPetkov, Kiril. The Voices of Medieval Bulgaria, Seventh-fifteenth Century: The Records of a Bygone Culture. Leiden ; Boston [Mass.]: Brill, 2008.
Cita MLAPetkov, Kiril. The Voices of Medieval Bulgaria, Seventh-fifteenth Century: The Records of a Bygone Culture. Brill, 2008.
Warning: These citations may not always be 100% accurate.