Dyfyniad APA

Feynman, R. P. (2006). Don't you have time to think? Penguin Books.

Dyfyniad Arddull Chicago

Feynman, Richard P. Don't You Have Time to Think? London: Penguin Books, 2006.

Dyfyniad MLA

Feynman, Richard P. Don't You Have Time to Think? Penguin Books, 2006.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.