APA (7th ed.) Citation

Arthur, P., & Jeffery, K. (1988). Northern Ireland since 1968 (1. publ.). Blackwell.

Chicago Style (17th ed.) Citation

Arthur, Paul, and Keith Jeffery. Northern Ireland Since 1968. 1. publ. Oxford u.a: Blackwell, 1988.

MLA (9th ed.) Citation

Arthur, Paul, and Keith Jeffery. Northern Ireland Since 1968. 1. publ. Blackwell, 1988.