Gaya APA

Ashari, R, T. (2008). SEQ : Spiritualitas Engineering Quotient . Yogyakarta: Arti Bumi Intaran.

Gaya MLA

Ashari, Rahmat, Thohir. "SEQ : Spiritualitas Engineering Quotient". Yogyakarta: Arti Bumi Intaran, 2008. Text.