by Marihot. P. Siahaan, S.E. $16.00
by Mirnawati $5.67
by Oka A. Yoeti $9.00
by Yayori Matsui $21.00
by Ahmad Akrom Fahmi $7.00
by Prof. Dr. Sondang P. Siagian, M.P.A $11.00