Grossmann, R. (1990). The Fourth Way: A Theory of Knowledge. Indiana University Press.
Chicago-čujuhus (17. p.)Grossmann, Reinhardt. The Fourth Way: A Theory of Knowledge. Bloomington: Indiana University Press, 1990.
MLA-čujuhus (9. p.)Grossmann, Reinhardt. The Fourth Way: A Theory of Knowledge. Indiana University Press, 1990.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.