Florence to Siena by bus

[Zivio]

My friend and I wish to travel one-way by bus from Florence to Siena on 9October2016. I understand there aren't many options on Sunday, so I'd like to purchase tickets in advance, but am having a hard time finding a schedule in English that I can read/understand. Suggestions? Thx!

[Lourdes]

You can search for and buy tickets online through the official TIEMME website - here's the link with a prelim search for the 9th at 9am

http://www.busfox.com/timetable/?fro...6&time=09%3A00