Siswanto, Ely. 2007. “EPUTUSAN NVESTASI, IVIDEN AN ENDANAAN KSTERNAL: INERGISITAS ALAM ENINGKATKAN ILAI ERUSAHAAN”. urnal konomi odernisasi 3 (1):54-62. http://ejournal.unikama.ac.id/index.php/JEKO/article/view/928.