Nordirland. The Ulster year-book: The official handbook of Northern Ireland. HMSO.
Cita Chicago Style (17a ed.)Nordirland. The Ulster Year-book: The Official Handbook of Northern Ireland. Belfast: HMSO.
Cita MLA (9a ed.)Nordirland. The Ulster Year-book: The Official Handbook of Northern Ireland. HMSO.
Precaución: Estas citas no son 100% exactas.