by Freddy Rangkuti $12.00
by Ir. H. Nazarukhan Yasin $13.00
by Drs. Amin Widjaja Tunggal, Ak., M.B.A $6.00
by Yayuk Sri Perwani, S.E $6.00
by Fredy Rangkuti $11.00
by - $7.00
by dr. Samsuridjal Djauzi $7.00