Spitaels, G. (1990). Emile Vandervelde, Josph Wauters, Achille Delattre. La Louvière: IEV.
芝加哥风格引文Spitaels, Guy. Emile Vandervelde, Josph Wauters, Achille Delattre. La Louvière: IEV, 1990.
MLA引文Spitaels, Guy. Emile Vandervelde, Josph Wauters, Achille Delattre. La Louvière: IEV, 1990.
警告：这些引文格式不一定是100％准确.