Lewis Michael. (2017). Undoing Project: Friendship that Changed the World. Penguin Books.
Čikaški stil citiranja (17. izdanje)Lewis Michael. Undoing Project: Friendship That Changed the World. Penguin Books, 2017.
MLA način citiranja (9. izdanje)Lewis Michael. Undoing Project: Friendship That Changed the World. Penguin Books, 2017.
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