Lua APA (7ú heag.)

Calkins, R. G. (1998). Medieval architecture in western europe: From a.d. 300 to 1500. Oxford unversity.

Lua i Stíl Chicago (17ú heag.)

Calkins, Robert G. Medieval Architecture in Western Europe: From A.d. 300 to 1500. New York: Oxford unversity, 1998.

Lua MLA (9ú heag.)

Calkins, Robert G. Medieval Architecture in Western Europe: From A.d. 300 to 1500. Oxford unversity, 1998.

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