APA aipamena

Covey, S. R. (2013). The 7 Habits of Highly Effective People. Simon & Schuster.

Chicago Style aipamena

Covey, Stephen R. The 7 Habits of Highly Effective People. UK: Simon & Schuster, 2013.

MLA aipamena

Covey, Stephen R. The 7 Habits of Highly Effective People. Simon & Schuster, 2013.