Cita APA (7th ed.)

Harari, Y. N. (2018). 21 lessons for the 21st century. Jonathan Cape, Radom Huse Uk.

Cita Chicago (17th ed.)

Harari, Yuval N. 21 Lessons for the 21st Century. London: Jonathan Cape, Radom Huse Uk, 2018.

Cita MLA (9th ed.)

Harari, Yuval N. 21 Lessons for the 21st Century. Jonathan Cape, Radom Huse Uk, 2018.

Atenció: Aquestes cites poden no estar 100% correctes.