Grossmann, R. (1990). The Fourth Way: A Theory of Knowledge. Indiana University Press.
Čikaški stil citiranja (17. izdanje)Grossmann, Reinhardt. The Fourth Way: A Theory of Knowledge. Bloomington: Indiana University Press, 1990.
MLA način citiranja (9. izdanje)Grossmann, Reinhardt. The Fourth Way: A Theory of Knowledge. Indiana University Press, 1990.
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