Aar Mengenang Dr. Stephen R. Covey; penulis buku Seven Habits of Highly Effective People Dr. Stephen R. Covey, penulis buku Seven Habits of Highly Effective People meninggal pada hari Senin (16/7) di usia 79 tahun. Covey meninggal di rumah Read More » July 17, 2012 No Comments