by Prof. Dr. Prayitno dan Drs. Erman Amti
$13.00

by Prof. Dr. Suharsimi Arikunto
$9.00

by Drs. Ary H. Gunawan
$7.00

by Dr. C. Asri Budiningsih
$7.00

by Dr. Moh. Shochib
$9.00

by Munandar. S.C. Utami (Ed)
$5.00