by Drs. Amin Wijaja Tunggal, M.B.A $7.00
by - $7.00
by FJ. Roethlisberger $9.00
by Richard G. Lipsey., dkk $16.00
by Ny. Susmayati, B.A dan Ny. Hj. Asnidar $7.00
by AT Mahmud $13.00