Spitaels, G. (1990). Emile Vandervelde, Josph Wauters, Achille Delattre. La Louvière: IEV.
Lua i Stíl Chicago (17ú heag.)Spitaels, Guy. Emile Vandervelde, Josph Wauters, Achille Delattre. La Louvière: IEV, 1990.
Lua MLA (8ú heag.)Spitaels, Guy. Emile Vandervelde, Josph Wauters, Achille Delattre. La Louvière: IEV, 1990.
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