Swaan, W. (1996). Die großen Kathedralen: Albi, Amiens, Bourges, Burgos, Canterbury, Lincoln, Mailand, Orvieto, Palma de Mallorca, Pamplona, Paris, Petersborough, Reims, Regensburg, Rouen, Salisbury, Sevilla, Siena, Strassburg, Toledo, Ulm, Wells, Wien, York (Unveränd. Nachdr.). DuMont.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিSwaan, Wim. Die Großen Kathedralen: Albi, Amiens, Bourges, Burgos, Canterbury, Lincoln, Mailand, Orvieto, Palma De Mallorca, Pamplona, Paris, Petersborough, Reims, Regensburg, Rouen, Salisbury, Sevilla, Siena, Strassburg, Toledo, Ulm, Wells, Wien, York. Unveränd. Nachdr. Köln: DuMont, 1996.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিSwaan, Wim. Die Großen Kathedralen: Albi, Amiens, Bourges, Burgos, Canterbury, Lincoln, Mailand, Orvieto, Palma De Mallorca, Pamplona, Paris, Petersborough, Reims, Regensburg, Rouen, Salisbury, Sevilla, Siena, Strassburg, Toledo, Ulm, Wells, Wien, York. Unveränd. Nachdr. DuMont, 1996.