by Dr. Albert M. Hutapea, MPH $11.00
by Jack Canfield & Mark Victor Hansen $12.00
by Drs. Sudarsono, S.H., M.Si $7.00
by Teddy Resmisari Pane $7.00
by Sufi S.Y. $6.00
by Susmayati, B.A., dkk $6.00