by A.H. Manurung, S.E $6.00
by Prof. Drs. H. Lili M. Sadeli, M.Pd & Drs. H. Bedjo Siswanto, M.Si $9.00
by Evelyn Clark $9.00
by Dr. Ir. Supli Effendi $7.00
by $9.00
by RH. Wiwoho $7.00