by Radiks Purba $13.00
by Drs. Amin Widjaja Tunggal, Ak., M.B.A $11.00
by Sei H. Dt. Tombak Alam $6.00
by Drs. Amin Wijaja Tunggal, M.B.A $7.00
by Drs. G. Kartasapoetra $7.00
by Prof. Dr. Suharsimi Arikunto, dkk $7.00