by Murad Lesmana, Jeanette
$5.00

by Drs. B. Boediono, M.Si
$11.00

by Pandji Anoraga, S.E., M.M
$13.00

by Desmizar, S.E., M.M
$12.00

by Prof. Dr. Suharsimi Arikunto
$7.00

by Radiks Purba
$13.00