by Sugiarto, Dergibson Siagian, dkk $7.00
by Prof. Komaruddin $11.00
by Charles C. manz, cs $11.00
by Akhmad Fauzi, Ph.D. $12.00
by Rhenald Kasali, Ph.D $34.00
by Johanes Lim, Ph.D., CPC $9.00
by Roger Leroy $16.00