by Jack Trout dan Steven Rivkin
$6.00

by Drs. Muchdarsyah Sinungan
$7.00

by Dr. Purnawan Junadi, Ph.D
$7.00

by Prof. Dr. Sondang P. Siagian, M.P.A
$11.00

by Prof. Drs. H.A.W. Widjaja
$6.00

by Bhikhu Parekh
$20.00