by Ir. Abbas Siregar Djarijah $5.00
by Ny. Lim $9.00
by Prof. Dr. Veithzal Rivai, MBA $18.00
by Ir. Hieronymus Budi Santoso $5.00
by Editor: Hadi Soesastro, Clara Joewono, Carolina G. Hernandez $6.00
by Ir. Sukim Prayitno $5.00