by - $11.00
by Arlyn J. Melcher $9.00
by Sisca Susanto $7.00
by Prof. Dr. Sondang P. Siagian, M.P.A $7.00
by Dino Patti Djalal $6.00
by Drs. Sarwono Pusposaputro $11.00
by Heru Yuwono $7.00