I'm writing a thesis about the Accords by the Basel Committee on Banking Supervision (BCBS).
If I put a table exactly from the Accords, I write in the table note "Source: BCBS (year)".
If I start from a table of the source but add something mine, I write in the table note that I started from BCBS (year) and I added something.
But if I take a table from the source and only change the order of the rows, to group the elements in a different way, or if I merge two tables from the source into one, without modifying the elements, should I write "Source: based on BCBS (year)" or is "Source: BCBS (year)" enough?