COVEY, S. R. (2006). The Eight (8th) Habit; Melampaui Efektivitas, Menggapai Keagungan. Gramedia Pustaka Utama.
Chicago Style (17th ed.) CitationCOVEY, Stephen R. The Eight (8th) Habit; Melampaui Efektivitas, Menggapai Keagungan. Gramedia Pustaka Utama, 2006.
MLA (8th ed.) CitationCOVEY, Stephen R. The Eight (8th) Habit; Melampaui Efektivitas, Menggapai Keagungan. Gramedia Pustaka Utama, 2006.
Warning: These citations may not always be 100% accurate.