by Daryl Koehn $9.00
by Maria Farida Indrati S. $11.00
by E. Martasudjita, Pr. $3.00
by Ir. Susy Fatena Roestiyanti, M.Sc $7.00
by John Kirvan $6.00
by Bernadetta Sri Lusiani, dkk. $7.00