by Drs. Agus Sujanto, dkk $7.00
by Cepi Triatna, S.Pd $7.00
by G. Sexilla, Cousuelo, dkk $7.00
by A. Tresna Sastrawijaya, M.Sc $7.00
by Syahrin Harahap $9.00
by Dr. B. Siswanto Sastrohadiwiryo $12.00