Cita APA (7a ed.)

Igal, J. (1981). The gnostics and the ancient philosophy in Porphyry and Plotinus. [s.n.].

Cita Chicago Style (17a ed.)

Igal, Jesús. The Gnostics and the Ancient Philosophy in Porphyry and Plotinus. [S.l.]: [s.n.], 1981.

Cita MLA (9a ed.)

Igal, Jesús. The Gnostics and the Ancient Philosophy in Porphyry and Plotinus. [s.n.], 1981.