by AAK (Aksi Agraris Kanisius) $5.00
by Dr. Budi Tri Akoso $9.00
by Karen Katafiasz $3.00
by Ir. H. Rahmat Rukmana, MBA., M.Sc. & Uu Sugandi Saputra, B.Sc $6.00
by $4.00
by Harjawiyata, Frans, OSCO $4.00