by Prof. DR. Soedjono Dirdjosisworo, SH. MBA $9.00
by Henry Simamora, S.E $18.00
by Ny. Susmayati, B.A dan Ny. Hj. Asnidar $7.00
by Nursaadah $7.00
by Aziz Alimul $9.00
by T.F. Honour dan R.M. Mainwaring $11.00