APA (7th ed.) Citation

Siémons, J. (1988). Theosophia in neo-platonic and Christian literature: (2nd to 6th century A.D.). Theosophical History Centre.

Chicago Style (17th ed.) Citation

Siémons, Jean-Louis. Theosophia in Neo-platonic and Christian Literature: (2nd to 6th Century A.D.). London: Theosophical History Centre, 1988.

MLA (8th ed.) Citation

Siémons, Jean-Louis. Theosophia in Neo-platonic and Christian Literature: (2nd to 6th Century A.D.). Theosophical History Centre, 1988.