Gaya APA

Covey, S, R. (1990). (PASCA) The 7 Habits of Highly Effective People : Powerful Lessons in Personal Change (Edisi 1). New York: Simon & Schuster.

Gaya MLA

Covey, Stephen, R.. "(PASCA) The 7 Habits of Highly Effective People : Powerful Lessons in Personal Change". Edisi 1 New York: Simon & Schuster, 1990. .