by Drs. Amin Widjaja Tunggal, Ak., M.B.A $9.00
by Prof. Dr. Burhanuddin Salam, M.M $7.00
by Aileen Mitchel Stewart $9.00
by Rhenald Kasali, Ph.D $34.00
by Prof. Ir. Amris Makmur $6.00
by Drs. CST. Kansil, S.H $12.00
by Mangasa Sidabutar $7.00