by Ir. Hatta Sunanta, B.Sc., MS $7.00
by Thomas Cain $9.00
by Agustinus Sarwanto, SJ & Veronica Riestasari $5.00
by Prof. DR. dr. S.M. Lumbantobing, SpS(K), SpKJ $6.00
by $9.00
by Dr. K.H. Didin Hafidudin $12.00