Armstrong, S. (2010). Utility indifference. Future of Humanity Institute.
Chicago-čujuhus (17. p.)Armstrong, S. Utility Indifference. Future of Humanity Institute, 2010.
MLA-čujuhus (9. p.)Armstrong, S. Utility Indifference. Future of Humanity Institute, 2010.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.