by Drs. Zifirdaus Adnan & Dra. I. Zifirdaus $9.00
by Prof. Dr. Sondang P. Siagian, M.P.A $9.00
by Lawis John P & Valcriana Kallab (Eds) $6.00
by Moenaf H. Regar $9.00
by Amien, Mohamad Miska $5.00
by Yusuf Mansur $3.65