by WK $12.00
by Ulrich $16.00
by Ir. G. Djatmiko Sudarmo & Ir. S. J. Edy Purnomo $11.00
by $7.00
by WK $13.00
by Rozali Abdullah $9.00
by Prof. Dr. Sondang P. Siagian, M.P.A $11.00
by Mustofa $5.00
by $6.00
by St. Darmawijaya, Pr $3.00
by Latifah Ibrahim Khadar $11.00