by Vincent Gaspersz $9.00
by Institut Studi Arus Informasi $12.00
by Von Der Mehden $9.00
by Prof. Dr. Sondang P. Siagian, M.P.A $11.00
by Silih Agung Wasesa $16.00
by Achmad Tjahhono, Mahagiyani $12.00