Cita APA (7th ed.)

Butler, D. E. (1980). British political facts: 1900-1979 (5th ed.). Macmillan.

Cita Chicago (17th ed.)

Butler, David E. British Political Facts: 1900-1979. 5th ed. London: Macmillan, 1980.

Cita MLA (9th ed.)

Butler, David E. British Political Facts: 1900-1979. 5th ed. Macmillan, 1980.