Feynman, R. P. (2005). Don't you have time to think? Penguin,.
Citazione stile Chigago Style (17a edizione)Feynman, Richard Phillips. Don't You Have Time to Think? London: Penguin,, 2005.
Citatione MLA (8a ed.)Feynman, Richard Phillips. Don't You Have Time to Think? Penguin,, 2005.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.