Plotinus. Plotinus: The Six Enneads / Translated by Stephen MacKenna and B. S. Page. - Chicago: Encyclopędia Britannica, [1955, c1952]. - vii, 360 p.: 25 cm. - Great books of the Western World, v. 17 . LCCN: 55010326 LC Class. No.: AC1 / .G72 vol. 17 Dewey Class. No.: 032 / HUG 1952 Vol. 17