APA Style

Covey, S, R. (1990). The 7 Habits Of Highly Effective Poeple (7 Kebiasaan Manusia yang Sangat Efektif): restoring the character ethic (Revisi). New York: A Fireside Book.

MLA Style

Covey, Stephen, R.. "The 7 Habits Of Highly Effective Poeple (7 Kebiasaan Manusia yang Sangat Efektif): restoring the character ethic". Revisi New York: A Fireside Book, 1990. Text.