Hasson, G. (2022). 21 Day Mindfulness Challenge. John Murray Learning.
芝加哥风格引文Hasson, Gill. 21 Day Mindfulness Challenge. UK: John Murray Learning, 2022.
MLA引文Hasson, Gill. 21 Day Mindfulness Challenge. John Murray Learning, 2022.
警告：这些引文格式不一定是100％准确.