by Prof. Dr. Suharsimi Arikunto
$11.00

by Drs. Abd. Aziz Ahmad, M.Pd
$7.00

by Dr. Paul Suparno, SJ.
$6.00

by Drs. Muchdarsyah Sinungan
$7.00

by Dr. Farida Rahim, M.Ed
$7.00

by Prof. Dr. Husaini Usman, M.Pd., M.T
$16.00