Cita APA (7a ed.)

Gulen, F., & Unal, A. (2004). Key concepts in the practice of Sufism: Emerald hills of the heart. Light.

Cita Chicago Style (17a ed.)

Gulen, Fethullah, y Ali Unal. Key Concepts in the Practice of Sufism: Emerald Hills of the Heart. Somerset, N.J: Light, 2004.

Cita MLA (9a ed.)

Gulen, Fethullah, y Ali Unal. Key Concepts in the Practice of Sufism: Emerald Hills of the Heart. Light, 2004.