Stephenson, P. (2002). Byzantium's Balkan frontier: A political study of the Northern Balkans, 900 - 1204 (Reprint.). Cambridge Univ. Press.
芝加哥风格引文Stephenson, Paul. Byzantium's Balkan Frontier: A Political Study of the Northern Balkans, 900 - 1204. Reprint. Cambridge [u.a.]: Cambridge Univ. Press, 2002.
MLA引文Stephenson, Paul. Byzantium's Balkan Frontier: A Political Study of the Northern Balkans, 900 - 1204. Reprint. Cambridge Univ. Press, 2002.
警告：这些引文格式不一定是100％准确.