Van der Walt, B. J. The Liberating message. Institute of Informal Studies.
芝加哥风格引文Van der Walt, B. J. The Liberating Message. Potchefstroom: Institute of Informal Studies.
MLA引文Van der Walt, B. J. The Liberating Message. Institute of Informal Studies.
警告：这些引文格式不一定是100％准确.