by Ir. Abbas Siregar Djarijah
$6.00

by Ellen Sue Stern
$9.00

by Prof. Dr. H. Abdurrahmat Fathoni, M.Si
$7.00

by Pandji Anoraga, S.E., M.M dan H. Djoko Sudantoko, S.Sos., M.M
$13.00

by Ir. Hieronymus Budi Santoso
$5.00

by KWI
$13.00