by Sumitro Djojohadikusumah $31.00
by $5.00
by Tony Buzan $11.00
by PENYUSUN: ZAKI AL-DIN 'ABD AL-AZHIM AL-MUNDZIRI $45.00
by Herbert G. Hick dan G. Ray Gullet $20.00
by P.I. Djiwandono $6.00