by WK $12.00
by Tanenbaum $13.00
by Harahap, Rustam Effendi $6.00
by WK $11.00
by Ariesto Hadi $16.00
by WK $20.00
by Sentosa Sembiring, SH. MH. $5.00
by Prof. Subowo, dr. M.Sc., Ph.D $7.00
by Y. T. Prasetiyo $5.00
by Heru Susanto $5.00
by Dr. H. Siswanto Sunarno, S.H., M.H. $7.00
by I.P.M. Ranuhandoko $16.00