by Drs. Amin Widjaja Tunggal, Ak., M.B.A $7.00
by John Salindeho $7.00
by Richard G. Lipsey & Peter O. Steiner $18.00
by Freddy Rangkuti $9.00
by Prof. Drs. Piet A. Sahertian $7.00
by RW. Allard $11.00