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Gaya APA

R.Covey, S. (2005). The 8th Habit : Melampaui Efektivitas, Menggapai Keagungan . Jakarta: PT.Gramedia Pustaka Utama.

Gaya MLA

R.Covey, Stephen. "The 8th Habit : Melampaui Efektivitas, Menggapai Keagungan". Jakarta: PT.Gramedia Pustaka Utama, 2005. Text.