Glass, M. (2011). Ultimatum. Mehta Publishing House.
Chicago-čujuhus (17. p.)Glass, Matthew. Ultimatum. Pune: Mehta Publishing House, 2011.
MLA-čujuhus (9. p.)Glass, Matthew. Ultimatum. Mehta Publishing House, 2011.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.