APA
Stephen Covey, . (2013). The 7 Habits of Highly Effective People: Powerful Lessons in Personal Change. New York: RosettaBooks.
Chicago
Stephen Covey, . 2013. The 7 Habits of Highly Effective People: Powerful Lessons in Personal Change. New York: RosettaBooks.
Harvard
Stephen Covey, . (2013). The 7 Habits of Highly Effective People: Powerful Lessons in Personal Change. New York: RosettaBooks.
MLA
Stephen Covey, . The 7 Habits of Highly Effective People: Powerful Lessons in Personal Change. New York: RosettaBooks. 2013.