by Drs. Amin Wijaja Tunggal, M.B.A $7.00
by Drs. Djalinus Syah., dkk $9.00
by Oren Harari $11.00
by Adler Haymans Manurung $7.00
by Sudradjat, S.E $6.00
by Prof. Mr. Roeslan Saleh $7.00