by Prof. Dr. Sudarwan Danim $11.00
by Prof. Drs. H. Soegyarto Mangkuatmodjo $9.00
by Imelda Akmal & Sony Sandjaya $12.00
by Julius R. Latumaerissa, S.E., M.M $7.00
by Sisca Susanto $7.00
by Purnomo, J.Gunawan, Magdalena $11.00