Abstracting/Indexing

   

http://journal.unnes.ac.id/nju/public/site/images/widiyanto/doaj 

http://journal.unnes.ac.id/nju/public/site/images/widiyanto/toc_319

http://journal.unnes.ac.id/nju/public/site/images/widiyanto/images_(2)   

EBSCO