by Ir. Ibnu Dwi Buwono, M.Si $7.00
by Prof. DR. Koentjaraningrat $9.00
by Laris Naihabo $6.00
by Mochamad Syafei, S.Pd. $9.00
by Lanny Soechan $6.00
by Christine Nostlinger $6.00
by $5.00