by - $9.00
by Drs. H. Abu Ahmadi $9.00
by Duvey, K.J $7.00
by Prof. Dr. Sondang P. Siagian, M.P.A $11.00
by Paul R. Krugman $9.00
by Susmayati, B.A., dkk $6.00
by N. John Myer $12.00