by Freemont E. Kast $16.00
by Dr. Eti Rochaety, dkk $9.00
by Prof. Dr. Husaini Usman, M.Pd & R. Purnomo Setiady Akbar, S.Pd., M.Pd $11.00
by Ir. Moehar Daniel, M.S $7.00
by Abel Tasman $6.00
by Sumarmo I.S - Markam Suprapti $7.00
by Dr. Kees Bertens $11.00