APA-ийн эшлэл(7 дахь хэвлэлт)

Stepanov, T., & Stefanova, T. (2010). The Bulgars and the Steppe Empire in the Early Middle Ages: The problem of the others. Brill.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Stepanov, T͡Svetelin, ба Tati͡ana Stefanova. The Bulgars and the Steppe Empire in the Early Middle Ages: The Problem of the Others. Leiden [The Netherlands] ; Boston: Brill, 2010.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Stepanov, T͡Svetelin, ба Tati͡ana Stefanova. The Bulgars and the Steppe Empire in the Early Middle Ages: The Problem of the Others. Brill, 2010.