Carnegie, D. (2021). How to Win friends and Influence People. Penguin Books.
Citazione stile Chigago Style (17a edizione)Carnegie, Dale. How to Win Friends and Influence People. Gurugram: Penguin Books, 2021.
Citatione MLA (9a ed.)Carnegie, Dale. How to Win Friends and Influence People. Penguin Books, 2021.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.