by WK $13.00
by Aziz Alimul $9.00
by Tanenbaum $16.00
by Hasbullah Thabrany (ed.) $11.00
by dr. R.H.H. Nelwan, DSPD $5.00
by Prof. DR. dr. S.M. Lumbantobing, SpS(K), SpKJ $6.00