by Maurice Duverger $7.00
by Drs. Soemarso, S.R $18.00
by Drs. Djalinus Syah $9.00
by Drs. Ibnu Syamsi, S.H $7.00
by Prof. Mr. Roeslan Saleh $7.00
by Prijono Tjiptoherijanto, S.E, M.A, Ph.D $7.00
by $6.00