APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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