Ehn, B., & Löfgren, O. (2010). The secret world of doing nothing. University of California Press.
Chicago-čujuhus (17. p.)Ehn, Billy, juo Orvar Löfgren. The Secret World of Doing Nothing. Berkeley: University of California Press, 2010.
MLA-čujuhus (9. p.)Ehn, Billy, juo Orvar Löfgren. The Secret World of Doing Nothing. University of California Press, 2010.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.