by Bachrawi Sanusi $7.00
by Ny. Eny Rahmaningsih $7.00
by Bambang Soepeno, M.Pd $9.00
by RW. Allard $11.00
by Prof. Dr. Sudarwan Danim $9.00
by Julius R. Latumaerissa, S.E., M.M $9.00