by Koestoer, Raldi Hendro $6.00
by Handi Irawan D., MBA, M.Com $7.00
by Drs. Abd. Aziz Ahmad, M.Pd $7.00
by ISEI $25.00
by Helmi Karim $6.00
by Margaret M. Polloma $12.00
by Andi Hamzah $0.00
by Richard I Levin $16.00