Cita APA (7th ed.)

Sepharial. (2004). Practical numerology: A handbook of interpretation. Indigo Books.

Cita Chicago (17th ed.)

Sepharial. Practical Numerology: A Handbook of Interpretation. New Delhi: Indigo Books, 2004.

Cita MLA (9th ed.)

Sepharial. Practical Numerology: A Handbook of Interpretation. Indigo Books, 2004.