APA-ийн эшлэл(7 дахь хэвлэлт)

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

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

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

MLA -ийн эшлэл (9 дэх хэвлэлт)

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