It's important that you reference where you found the public licence to avoid plagiarism and to allow for follow ups on <copyrightIssuesLink>copyright issues</copyrightIssuesLink>. Here are a few ways you can cite the work.
Mae'n bwysig eich bod yn dweud ble y daethoch o hyd i'r drwydded gyhoeddus er mwyn osgoi llên-ladrad ac i ganiatáu ar gyfer y camau dilynol ar <copyrightIssuesLink>faterion hawlfraint</copyrightIssuesLink>. Dyma rai ffyrdd y gallwch chi ddyfynnu'r gwaith.