by F. Suryatmo $6.00
by Prof. Dr. H.A.R. Tilaar, MSc.Ed $11.00
by H. Rahmat Rukmana $5.00
by Arlyn J. Melcher $9.00
by Prof. Drs. H. Dakir $7.00
by Prof. DR. Taliziduhu Ndraha $11.00