In text (first cite):
Social Care Wales (SCW, 2017) states that.
. (Social Care Wales (SCW), 2017).
In text (second and subsequent cites):
SCW (2017) states that.
If you are referring to a specific section of the code you will need to include the section number, for example:
In text (first cite):
Social Care Wales (SCW, 2017, 2.1).
. (Social Care Wales (SCW), 2017, 2.1).
In text (second and subsequent cites):
SCW (2017, 2.1).
In the reference list:
Social Care Wales. (2017). Code of professional practice for social care.