Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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