Lua APA (7ú heag.)
Ralls, K. (2015). Gothic cathedrals: A guide to the history, places, art, and symbolism. Ibis Press.
Lua i Stíl Chicago (17ú heag.)
Ralls, Karen. Gothic Cathedrals: A Guide to the History, Places, Art, and Symbolism. Lake Worth, Florida: Ibis Press, 2015.
Lua MLA (9ú heag.)
Ralls, Karen. Gothic Cathedrals: A Guide to the History, Places, Art, and Symbolism. Ibis Press, 2015.
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