by Prof. Dr. Sondang P. Siagian, M.P.A $9.00
by Ch. Lilies Sutarminingsih $7.00
by H. Rahmat Rukmana $5.00
by DR. Ir. Liliek Agustina $6.00
by Warisno $6.00
by M. Nipan Abdul Hailm & Suharno $6.00
by Thayadi $0.00