Linguistic map of ancient East Asia before 2000-1500 BCE
<a href="//commons.wikimedia.org/wiki/User:Bookworm8899" title="User:Bookworm8899">Bookworm8899</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>,<br>*Unger, James M. (2013). <i><a rel="nofollow" class="external text" href="http://www.ikga.oeaw.ac.at/mediawiki/images/4/41/Unger_2013_presentation2.pdf">Comparing the Japanese and Korean Languages: Culling Borrowed Words</a></i>. Department of East Asian Languages &amp; Literatures The Ohio State University.