Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

Arthur, Paul, et al. Northern Ireland Since 1968. Basil Blackwell, 1988.