Harari, Y. N. (2018). 21 lessons for the 21st century. Jonathan Cape, Radom Huse Uk.
Chicago-čujuhus (17. p.)Harari, Yuval N. 21 Lessons for the 21st Century. London: Jonathan Cape, Radom Huse Uk, 2018.
MLA-čujuhus (9. p.)Harari, Yuval N. 21 Lessons for the 21st Century. Jonathan Cape, Radom Huse Uk, 2018.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.