APA Style

Covey, S. (2008). The 6 Most Important Decisions You'll Ever Make (6 Keputusan Terpenting yang Akan Kamu Ambil) (1st. Ed.). Tangerang: Karisma Publishing Group.

MLA Style

Covey, Sean. "The 6 Most Important Decisions You'll Ever Make (6 Keputusan Terpenting yang Akan Kamu Ambil)". 1st. Ed. Tangerang: Karisma Publishing Group, 2008. Text.