Cumpa, J., & Tegtmeier, E. (2011). Ontological categories. Ontos Verlag.
Chicago Style (17th ed.) CitationCumpa, Javier, and Erwin Tegtmeier. Ontological Categories. Frankfurt: Ontos Verlag, 2011.
MLA citiranjeCumpa, Javier, and Erwin Tegtmeier. Ontological Categories. Ontos Verlag, 2011.
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