by Ir. M. Lies Suprapti $6.00
by Eko Agus Triwiyatno $5.00
by Emanuel Gerrit Singgih, Ph.D. $7.00
by Vincent P. Colinns $6.00
by Duane Schlutz $7.00
by Anthony F. Chiffolo $4.00
by Bagir Manan $7.00