by Dr. Ibrahim Bafadal, M.Pd $6.00
by Maesaroh D. Mansur, S.Pd $6.00
by Drs. Sindu Galba $6.00
by K. Svalastoga $7.00
by Richard G. Lipsey & Peter O. Steiner $16.00
by Drs. Slameto $7.00
by Jerome Samuel $6.00