Lewis Michael. (2017). Undoing Project: Friendship that Changed the World. Penguin Books.
Citazione stile Chigago Style (17a edizione)Lewis Michael. Undoing Project: Friendship That Changed the World. Penguin Books, 2017.
Citatione MLA (9a ed.)Lewis Michael. Undoing Project: Friendship That Changed the World. Penguin Books, 2017.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.