by Lalu Husni, S.H., M.Hum $9.00
by Sururin, M.Ag $6.00
by Frank Bettger $11.00
by Prof. Dr. Sondang P. Siagian, M.P.A $7.00
by James F. Brenan $20.00
by Darmadi D., dkk $7.00
by Prof. Dr. Ahmad Shalaby $12.00