Wren, G. (2001). A most ingenious paradox: The art of Gilbert and Sullivan. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Wren, Gayden. A Most Ingenious Paradox: The Art of Gilbert and Sullivan. New York: Oxford University Press, 2001.
Lua MLA (9ú heag.)Wren, Gayden. A Most Ingenious Paradox: The Art of Gilbert and Sullivan. Oxford University Press, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.