5.9 Paragraphs 5.1 to 5.4 apply equally in relation to documents and reports on statistics and social research.
5.9 Mae paragraff 5.1 i 5.4 yr un mor berthnasol yng nghyswllt dogfennau ac adroddiadau sy’n ymwneud â maes ystadegau ac ymchwil gymdeithasol.