Armstrong, D. (1973). Belief, truth and knowledge. C.U.Pr..
Chicago-čujuhus (17. p.)Armstrong, D.M. Belief, Truth and Knowledge. Cambridge: C.U.Pr., 1973.
MLA-čujuhus (9. p.)Armstrong, D.M. Belief, Truth and Knowledge. C.U.Pr., 1973.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.