Here are two Sanskrit sources:

* https://sa.wikibooks.org/wiki/%E0%A4%85%E0%A4%B0%E0%A5%8D%E0...

* https://ia800308.us.archive.org/23/items/arthasastraofkou014...

Two sources for R. Shamasastry's English translation:

* https://en.wikisource.org/wiki/Arthashastra

* http://www.bharatadesam.com/literature/kautilya_arthashastra...

And four dictionaries:

* http://sanskritdictionary.com/?iencoding=deva&q=%E0%A4%85%E0...

* https://en.wiktionary.org/wiki/%E0%A4%85%E0%A4%B0%E0%A5%8D%E...

* http://sanskritdictionary.org/arthatvaya

* http://spokensanskrit.de/index.php?script=HK&beginning=0+&ti...

And one transliteration:

* http://www.cc.kyoto-su.ac.jp/~yanom/sanskrit/dharmas/arthaz....