by Johanes Lim, Ph.D., CPC
$9.00

by Prof. Dr. Husaini Usman, M.Pd & R. Purnomo Setiady Akbar, S.Pd., M.Pd
$11.00

by Ir. Moehar Daniel, M.S & Ir. Darmawati, M.Sc & Ir. Nieldalina, M.Si
$7.00

by W.A.R. Thomson
$6.00

by Prof. Dr. H. Zainuddin Ali M. A.
$7.00

by H. Salim HS. S.H., M.S.
$16.00