Cita APA (7th ed.)

Butler, D. E., Butler, G., & Butler, D. (2000). Twentieth-century British political facts, 1900-2000 (8th ed.). Macmillan.

Cita Chicago (17th ed.)

Butler, David E., Gareth Butler, i David Butler. Twentieth-century British Political Facts, 1900-2000. 8th ed. Houndmills, Basingstoke, Hampshire: Macmillan, 2000.

Cita MLA (9th ed.)

Butler, David E., et al. Twentieth-century British Political Facts, 1900-2000. 8th ed. Macmillan, 2000.