by M. Hartono $3.00
by Abdullah Ahmad Aasyur $6.00
by Ir. H. Rahmat Rukmana, MBA., M.Sc. & Uu Sugandi Saputra, B.Sc $6.00
by Prof. Dr. Abdul Munir Mulkhan $12.00
by Gede Prama $7.00
by Katzung $24.00