Hartman, J., & Koschalka, B. (2015). Philosophical heuristics. Peter Lang Edition.
Chicago-čujuhus (17. p.)Hartman, Jan, juo Ben Koschalka. Philosophical Heuristics. Frankfurt am Main, [Germany]: Peter Lang Edition, 2015.
MLA-čujuhus (9. p.)Hartman, Jan, juo Ben Koschalka. Philosophical Heuristics. Peter Lang Edition, 2015.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.