Barber, M. (2004). Two cities: Medieval Europe, 1050-1320 (2nd ed.). Routledge.
Chicago Style (17. basım) AtıfBarber, Malcolm. Two Cities: Medieval Europe, 1050-1320. 2nd ed. London ; New York: Routledge, 2004.
MLA (8th ed.) AtıfBarber, Malcolm. Two Cities: Medieval Europe, 1050-1320. 2nd ed. Routledge, 2004.
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