by Denny J. A $6.00
by DM. Etter, Terj. Drs. Kusuma Wiraman $13.00
by Drs. Amin Wijaja Tunggal, M.B.A $6.00
by Sayyid Sabiq $9.00
by Drs. Marcel Go, M.S $7.00
by Drs. Suharto, dkk $7.00