APA (7th ed.) Citation

Arthur, P., & Jeffery, K. (1988). Northern Ireland since 1968 / Paul Arthur and Keith Jeffery. Basil Blackwell.

Chicago Style (17th ed.) Citation

Arthur, Paul, and Keith Jeffery. Northern Ireland Since 1968 / Paul Arthur and Keith Jeffery. Oxford: Basil Blackwell, 1988.

MLA (9th ed.) Citation

Arthur, Paul, and Keith Jeffery. Northern Ireland Since 1968 / Paul Arthur and Keith Jeffery. Basil Blackwell, 1988.

Warning: These citations may not always be 100% accurate.