Markus, R. A. (1999). Augustine on magic: A neglected semiotic theory. Christianity in Relation to Jews, Greeks, and Romans.
Lua i Stíl Chicago (17ú heag.)Markus, Robert A. "Augustine on Magic: A Neglected Semiotic Theory." Christianity in Relation to Jews, Greeks, and Romans 1999.
Lua MLA (8ú heag.)Markus, Robert A. "Augustine on Magic: A Neglected Semiotic Theory." Christianity in Relation to Jews, Greeks, and Romans, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.