by Ir. Laode M. Aslan $7.00
by Darminta, J, SJ $4.00
by Ir. M. Lies Suprapti $7.00
by Setijo Pitojo & Hesti Nira Puspita $12.00
by Aziz Alimul $11.00
by Prof. dr. H. Sidarta Ilyas, SpM $11.00
by Abdul Moqzit Ghozali $7.00
by Ir. Setijo Pitojo $9.00
by WK $16.00
by Fitria Zelfis $3.75