by Syam Hardy $9.00
by Thabrani $12.00
by Ir. Heinz Frick & Moediartianto $7.00
by Syaifuddin $12.00
by Thabrani $11.00
by WK $12.00
by Prof. Dr. Sondang P. Siagian, M.P.A $7.00
by Drs. Thohir Luth, M.A., dkk $6.00
by - $11.00
by R. Wiyono, S. H. $12.00