Abas, Husen2018-07-262018-07-2608588335810078-7566b16424372http://hdl.handle.net/1885/145414222 pagesapplication/pdfen-AUAuthor/s retain copyrightCC BY-SA 4.0https://creativecommons.org/licenses/by/4.0/Indonesian languageIndonesian as a unifying language of wider communication : a historical and sociolinguistic perspective198710.15144/PL-D73Released under Creative Commons License (Attribution 4.0 International)