by WK $16.00
by Tanenbaum $13.00
by J. Guwandhi, SH. $6.00
by Prof. Dr. Nur Nasry Noor, M.P.H $6.00
by Prof. DR. dr. S.M. Lumbantobing, SpS(K), SpKJ $6.00
by Fajar Junaedi $9.00