Taylor, B. G. (1891). The sardonyx seal: A romance of Normandy. G.P. Putnam's Sons.
Lua i Stíl Chicago (17ú heag.)Taylor, Belle Gray. The Sardonyx Seal: A Romance of Normandy. New York: G.P. Putnam's Sons, 1891.
Lua MLA (8ú heag.)Taylor, Belle Gray. The Sardonyx Seal: A Romance of Normandy. G.P. Putnam's Sons, 1891.
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