by Uken Junaedi $5.77
by Arief, Sritua $7.00
by Dr. Iwan Triyuwono $9.00
by Prof. Dr. Sondang P. Siagian, M.P.A $7.00
by Moenaf H. Regar $9.00
by Prof. Dr. S. Nasution, M.A. $7.00