Carl, C. (2011). A bishopric between three kingdoms: Calahorra, 1045-1190. Brill.
Chicago-viite (17. p.)Carl, Carolina. A Bishopric Between Three Kingdoms: Calahorra, 1045-1190. Leiden: Brill, 2011.
MLA-viite (9. p.)Carl, Carolina. A Bishopric Between Three Kingdoms: Calahorra, 1045-1190. Brill, 2011.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.