by Henry Simamora, S.E $18.00
by R. Moh. Ali $11.00
by J. Stallard, Terj. Drs. Hasymi Ali $11.00
by Harmanto Edy Jatmiko $7.00
by Samekto, S.S., M.A $7.00
by Shinta Devi Ika Santhi Rahayu $11.00