Gulen, M. F. (2009). Key concepts in the practice of sufism: Emerald hills of the heart. Tughra Books.
Chicago Style (17th ed.) CitationGulen, M. Fethullah. Key Concepts in the Practice of Sufism: Emerald Hills of the Heart. Tughra Books, 2009.
MLA (8th ed.) CitationGulen, M. Fethullah. Key Concepts in the Practice of Sufism: Emerald Hills of the Heart. Tughra Books, 2009.
Warning: These citations may not always be 100% accurate.