by Prof. Abdur Rahman I Do'I, Ph.D $7.00
by Prof. DR. Sukardjo $13.00
by Dr. Ronald Hutapea, SKM, Ph.D $6.00
by Ir. Suprio Guntoro $5.00
by Drs. Amin Widjaja Tunggal, Ak., M.B.A $9.00
by Ir. Indriyanto $9.00
by Karl May $5.00