(1971). An inquiry into the nature of man: His inhumanity and his humanity. Center for Humanities.
Chicago-viite (17. p.)An Inquiry into the Nature of Man: His Inhumanity and His Humanity. White Plains, N.Y: Center for Humanities, 1971.
MLA-viite (9. p.)An Inquiry into the Nature of Man: His Inhumanity and His Humanity. Center for Humanities, 1971.
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