SEVI. 371/1568: Briefwisseling Toon Colpaert december 1992-oktober 1993.
芝加哥风格引文SEVI. 371/1568: Briefwisseling Toon Colpaert December 1992-oktober 1993.
MLA引文SEVI. 371/1568: Briefwisseling Toon Colpaert December 1992-oktober 1993.
警告：这些引文格式不一定是100％准确.