by Dr. Ronald Hutapea, SKM, Ph.D $6.00
by J. Stallard, Terj. Drs. Hasymi Ali $11.00
by Drs. Sudarsono , S.H., M.Si/A. Shallaby $12.00
by Sei H. Dt. Tombak Alam $6.00
by A. Tresna Sastrawijaya, M.Sc $9.00
by N. John Myer $12.00
by $12.00
by - $12.00