https://www.sonamlyfra.cymru/en/news-1/erthygl%3A-pa-lyfrau-i'w-prynu-'dolig-'22%3F 2022-12-16 https://www.sonamlyfra.cymru/en/news-1/10-llyfr-i'w-darllen-cyn-i-chi-droi'n-ddeg! 2020-11-06 https://www.sonamlyfra.cymru/en/news-1/s%C3%B4n-am-lyfra'n-lansio!!----s%C3%B4n-am-lyfra-goes-live! 2020-03-21