by Dwijawiyata, dkk $5.00
by Komlit KWI $9.00
by Prof. DR. Taliziduhu Ndraha $13.00
by Iwan Yusi, S.Pd $7.00
by J. Price Gittinger $6.00
by Drs. H. Abu Ahmadi $11.00
by Daniel Mardiyarso $9.00