Allow me to be a pedantic nitpicker here. According to a news release from Indiana University, "Despite school referenda failures on Tuesday, Indiana now a referenda state." Boy, that grates on my ears. From the personal blog of Lord Norton, professor at Hull University and member of the House of Lords:
We speak of referendums, not referenda, on the advice of the editors of the Oxford English Dictionary: “Referendum is logically preferable as a plural form meaning ballots on one issue (as a Latin gerund referendum has no plural). The Latin plural gerundive referenda, meaning