by Pandji Anoraga, S.E., M.M $13.00
by Clive Gray, Payaman Simanjuntak, dkk $12.00
by Drs. M. Daryono., dkk $9.00
by Dr. Achmad S. Ruky $11.00
by Margaret M. Polloma $12.00
by Drs. Zifirdaus Adnan & Dra. I. Zifirdaus $9.00