by Sofyan Syafri Harahap $7.00
by Drs. Amin Widjaja Tunggal, Ak., M.B.A $9.00
by Rivai, Harrizul $9.00
by Drs. Abdulsyani $9.00
by Walker, Edward L $6.00
by Kamaruddin Ahmad., S.E $11.00