by Ir. Rahmat Rukaman, MBA & Hj. Yuyun
$6.00

by Prof. Dr. Sondang P. Siagian, M.P.A
$7.00

by Dr. Beate Jakob, Dr. Cristoph Benn & Dr. Erlinda Senturias
$7.00

by Drs. Husein Umar, S.E., M.M., MBA
$9.00

by Nunung Marlina Djarijah & Ir. Abbas Siregar Djarijah
$6.00

by Kim Kiyosaki
$11.00