by Desmizar, S.E., M.M $12.00
by Prof. DR. Taliziduhu Ndraha $9.00
by Richard Whiteley $7.00
by Erman Rajagukguk, S.H $6.00
by Wiwoho Soedjono, S.H $7.00
by Dr. Oemar Hamalik $7.00