by Sarlito Wirawan $9.00
by Ir. Abbas Siregar Djarijah $6.00
by Dr. H. Abuddin Nata, MA $11.00
by Ir. H. Rahmat Rukmana $5.00
by KH. Moh. Amin Suma $7.00
by Destivano Wibowo & Harjon Sinaga $7.00