Calkins, R. G. (1998). Medieval architecture in western europe: From a.d. 300 to 1500. Oxford unversity.
Chicagoスタイル(17版)引用形式Calkins, Robert G. Medieval Architecture in Western Europe: From A.d. 300 to 1500. New York: Oxford unversity, 1998.
MLA(9版)引用形式Calkins, Robert G. Medieval Architecture in Western Europe: From A.d. 300 to 1500. Oxford unversity, 1998.
警告: この引用は必ずしも正確ではありません.