by Richard Carlson, Ph.D $11.00
by Drs. Husein Umar, S.E., M.M., MBA $9.00
by Tria Ayu K $5.00
by Freddy Rangkuti $9.00
by $6.00
by Muttaqwiati $7.00
by K.H. Moenawar Chalil $11.00
by M. Tohar $7.00
by Mary Rebecca 'Rivkha' E. Rogacion R. G. S $7.00
by Slamet Soetrisno $6.00