by Prof. Dr. Suharsimi Arikunto
$11.00

by DR. Ir. Hj. Tati Nurmala, S.W
$6.00

by Drs. Rudy T. Erwin, S.H
$7.00

by Drs. Amin Widjaja Tunggal, Ak., M.B.A
$6.00

by Drs. H. Burhanuddin Salam, M.M
$11.00

by Thabrani
$9.00