Arthur, P., & Jeffery, K. (1996). Northern Ireland since 1968 (2nd ed.). Blackwell.
Cita Chicago Style (17a ed.)Arthur, Paul, y Keith Jeffery. Northern Ireland Since 1968. 2nd ed. Oxford [etc.]: Blackwell, 1996.
Cita MLA (9a ed.)Arthur, Paul, y Keith Jeffery. Northern Ireland Since 1968. 2nd ed. Blackwell, 1996.
Precaución: Estas citas no son 100% exactas.