Sulistyo, Sulistyo, and Vinus Maulina. 2010. “SYMMETRIC NFORMATION OST AN OLDING ERIODS AHAM IASA I URSA FEK NDONESIA”. urnal konomi odernisasi 6 (3):235-57. http://ejournal.unikama.ac.id/index.php/JEKO/article/view/42.