Cita APA (7a ed.)

BUTLER, D., & Butler, D. . a. S. (1980). British political facts, 1900- 1967 (5th ed.). Palgrave Macmillan.

Cita Chicago Style (17a ed.)

BUTLER, David, y David and Sloman Butler. British Political Facts, 1900- 1967. 5th ed. London: Palgrave Macmillan, 1980.

Cita MLA (9a ed.)

BUTLER, David, y David and Sloman Butler. British Political Facts, 1900- 1967. 5th ed. Palgrave Macmillan, 1980.