Official Email Address Change


We would like to apologize, that official JTL email address ( was unaccessed due to BPPT intergration to BRIN (National Research and Innovation Agency). Please resend your email to


JTL Editorial Team

May 16, 2022



We would like to inform that our latest accreditation on Sinta 2 has been verified and issued by Ministry of Research and Tehnology - BRIN (signed Dec 23rd 2020);

You can follow this link to access the document.


JTL Editorial Team

April 13, 2021

OJS Migration


We would like to apologize, currently we're still in the middle of migration to OJS 3 (we just installed OJS 3 around early August 2020). Therefore you will find that the issues of JTL is incomplete. FYI our most recent issue is volume 21 no 2 (published on July 2020).

We are still working our best to add the contents, including the issues, author guidelines, publication policy & ethics statements, etc. Hopefully we will be able to migrate completely in the next few months.


JTL Editorial Team

August 28, 2020