by Bambang Purbowaseso $7.00
by Drs. H. Malayu S.P. Hasibuan $7.00
by Sawidji Widoatmodjo, S.E $9.00
by Drs. Ibnu Syamsi, S.U $9.00
by Abustam, Muhammad Idrus $9.00
by Julius R. Latumaerissa, S.E., M.M $7.00