Johansson, I. (2004). Ontological investigations: An inquiry into the categories of nature, man and society. Ontos Verlag.
Chicago-viite (17. p.)Johansson, Ingvar. Ontological Investigations: An Inquiry into the Categories of Nature, Man and Society. Frankfurt: Ontos Verlag, 2004.
MLA-viite (9. p.)Johansson, Ingvar. Ontological Investigations: An Inquiry into the Categories of Nature, Man and Society. Ontos Verlag, 2004.
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