Cilliers, J. (2020). Grace upon grace: Reflections on the meaning of life. Sun Media.
芝加哥风格引文Cilliers, Johan. Grace upon Grace: Reflections on the Meaning of Life. [Stellenbosch]: Sun Media, 2020.
MLA引文Cilliers, Johan. Grace upon Grace: Reflections on the Meaning of Life. Sun Media, 2020.
警告：这些引文格式不一定是100％准确.