by Prof. DR. S.P. Siagian, M.P.A $9.00
by Prof. Richard Chauvel $7.00
by Drs. Amin Widjaja Tunggal, Ak., M.B.A $7.00
by $12.00
by I Ngurah Suryawan $12.00
by Drs. Soemarso, S.R $16.00