by Drs. Bambang Siswanto, M.A $6.00
by Dr. Ibrahim Bafadal, M.Pd $6.00
by Joe Girard $7.00
by Drs. Agus M. Hardjana, M.Sc., Ed $6.00
by Rhenald Kasali, Ph.D $20.00
by Adhiningsih $9.00