For multiple instances: Open the last correct version (click on the date), hit "Edit" on that page and publish it with an appropriate edit summary.
For a single vandalism edit: Click "undo" next to the revision where vandalism occurred, preview the change, and publish it with an edit summary.
Report vandals at Logopedia's user reports or contact an administrator. Make sure that you are being civil and following policy. Edit wars are not permitted on Logopedia.
For any version listed below, click on its date to view it.For more help, see Help:Page history. (cur) = difference from current version, (prev) = difference from preceding version,m = minor edit, → = section edit, ← = automatic edit summary