Gulen, F., & Unal, A. (2004). Key concepts in the practice of Sufism: Emerald hills of the heart. Light.
芝加哥风格引文Gulen, Fethullah, 与 Ali Unal. Key Concepts in the Practice of Sufism: Emerald Hills of the Heart. Somerset, N.J: Light, 2004.
MLA引文Gulen, Fethullah, 与 Ali Unal. Key Concepts in the Practice of Sufism: Emerald Hills of the Heart. Light, 2004.
警告：这些引文格式不一定是100％准确.