Não informado. (2004). CIWM Scientific & Technical Review. IWM Business Services.
Lua i Stíl Chicago (17ú heag.)Não informado. CIWM Scientific & Technical Review. Northampton, Inglaterra: IWM Business Services, 2004.
Lua MLA (8ú heag.)Não informado. CIWM Scientific & Technical Review. IWM Business Services, 2004.
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