Ong, W. J. (1950). Spires on the Canterbury Cathedral in Canterbury, England.
Lua i Stíl Chicago (17ú heag.)Ong, Walter J. Spires on the Canterbury Cathedral in Canterbury, England. 1950.
Lua MLA (8ú heag.)Ong, Walter J. Spires on the Canterbury Cathedral in Canterbury, England. 1950.
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