Lewis Michael. (2017). Undoing Project: Friendship that Changed the World. Penguin Books.
芝加哥风格引文Lewis Michael. Undoing Project: Friendship That Changed the World. Penguin Books, 2017.
MLA引文Lewis Michael. Undoing Project: Friendship That Changed the World. Penguin Books, 2017.
警告：这些引文格式不一定是100％准确.