by A.H. Manurung, S.E $6.00
by T. Wexley & A. Yuki $9.00
by Prof. DR. Taliziduhu Ndraha $9.00
by Ny. Susmayati, B.A dan Ny. Hj. Asnidar $6.00
by I. Wibowo $11.00
by Budi Streptiadi $7.00