Liungman, C. G. (2004). Symbols: Encyclopedia of Western signs and ideograms. HME Publ..
Lua i Stíl Chicago (17ú heag.)Liungman, Carl G. Symbols: Encyclopedia of Western Signs and Ideograms. Stockholm: HME Publ., 2004.
Lua MLA (8ú heag.)Liungman, Carl G. Symbols: Encyclopedia of Western Signs and Ideograms. HME Publ., 2004.
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