by Drs. Thomas Suyatno, dkk $11.00
by Gunawan Wijaya dan Ahmad Yani $7.00
by Kusnadi $7.00
by Maurice Duverger/Alfian $12.00
by Tonny Greener $7.00
by Prof. Dr. Sondang P. Siagian, M.P.A $11.00
by Kamaruddin Ahmad., S.E $7.00