As I read Bhagavad Gita As It Is 1st chapter from here (http://asitis.com/) I stopped at the 8th verse and switched to this site (www.bhagavad-gita.org) and noticed that 8th verse is different in both the sites so I posted this question immediately.
Srila Prabhupada's BG As It Is says:
"bhavan bhismas ca karnas ca krpas ca samitim-jayah asvatthama vikarnas ca saumadattis tathaiva ca". (BG 1.8)
and bhagavad-gita.org says:
bhavan bhishmas ca karnas ca krpas ca samittinjaya ashvatthama vikarnas ca saumadattir jayadratah (BG 1.8).
Notice that the 1st verse contains "tathaiva ca" at end, and the 2nd verse says "jayadratah" at the end. I checked other sites as well (you can find them online easily) and BG from different authors also use either of the words. So it seems like there are different versions of the Gita.
Are there really different versions/recension of the Gita? If not, then is it "tathaiva ca" at the end or "jayadratah"? Or, are both of them acceptable and authentic? If not, then which one is correct and how can we know it is authentic?