Hi Keren,

> I am reading Thanissaro Bhikkhu book "the wings of awakening" and I
> don't know how to find his references in the PTS. What will be
> S.XLVIII.10? (p.141). How can I find his references in the Pali CD?

Throught the Access to Insight website you can find the relevant section:
http://www.accesstoinsight.org/tipitaka/sn/index.html#sn48

and look up there the PTS reference:
S v 197

Metta,
Dmytro