by Hermawan Kartajaya cs $12.00
by Prof. Dr. H. Abdurrahmat Fathoni, M.Si $11.00
by Wahyu Wibowo $9.00
by Prof. Dr. Husaini Usman, M.Pd., M.T $16.00
by Hermawan Kartajaya $18.00
by Bachrawi Sanusi $7.00