by - $11.00
by Bambang Poemomo, S.H $9.00
by ISEI $12.00
by Pandji Anoraga, S.E., M.M dan H. Djoko Sudantoko, S.Sos., M.M $13.00
by $13.00
by Prof. Dr. Sondang P. Siagian, M.P.A $7.00