by - $16.00
by Drs. Amin Widjaja Tunggal, Ak., M.B.A $9.00
by Prof. Dr. Winardi $9.00
by Arifin Pasaribu $5.57
by Prof. J. Suprapto, M.A. APU $9.00
by Helmut Morsbach, dkk $7.00