Gaya APA

Azhar, T, N., Shafa, D. (2007). Be The Great With The Geeg Principles : For spiritual business and Corporate Spiritual Investment . Bandung: Azzam Publishing.

Gaya MLA

Azhar, Tauhid, Nur., Shafa, Devi. "Be The Great With The Geeg Principles : For spiritual business and Corporate Spiritual Investment". Bandung: Azzam Publishing, 2007. Book.