by Sanapiah Faisal $9.00
by Prof. Dr. H.A.R. Tilaar, MSc.Ed $11.00
by Prof. Dr. H. Abdurrahmat Fathoni, M.Si $7.00
by Drs. Robinson Tarigan $9.00
by Prof. Dr. Dendasurono P $7.00
by Drs. Ajat Sudrajat $7.00