APA Style

Simson, O, G, V, S, O, G, V. (). The Gothic CathedralOrigins of Gothic Architecture and the Medieval Concept of Order - Expanded Edition . : .

MLA Style

Simson, Otto, Georg, Von, Simson,, Otto, Georg, Von. "The Gothic CathedralOrigins of Gothic Architecture and the Medieval Concept of Order - Expanded Edition". : , . [electronic resource].