by Dr. H. Amzah B. Uno, M.Pd $7.00
by Imam Syaukani & A. Ahsin Thohari $7.00
by Prof. Dr. H.A.R. Tilaar, MSc.Ed $11.00
by Prof. Dr. S. Nasution, M.A. $7.00
by Abdul Wahhab Khallaf $9.00
by Huala Adolf $9.00