Gaya APA

Abdullah, G. (2005). Maintain the Heart: The Step by Step of Qolbu Management (Cetakan ke-8). Bandung: PT Mutiara Qolbu.

Gaya MLA

Abdullah, Gymnastiar. "Maintain the Heart: The Step by Step of Qolbu Management". Cetakan ke-8 Bandung: PT Mutiara Qolbu, 2005. Text.