by Danielle Steel $7.00
by Irmansyah Effendi, M.Sc $9.00
by Ari Sunarni $8.00
by Susmayati, B.A., dkk $6.00
by Ir. Hieronymus Budi Santoso $5.00
by Drs. Hg. Suseno Triyanto Widodo $6.00