by Ade Fatimah $6.00
by Tony Buzan $16.00
by Drs. Amin Widjaja Tunggal, Ak., M.B.A $9.00
by Drs. J. Riwu Kaho $9.00
by Dra. Dwi Hayu Agustini, MBA $9.00
by Drs. H.M. Daryanto $7.00