Citazione APA

Butler, D., & Freeman, J. (1968). British Political Facts 1900 - 1967 (2nd ed.). Macmillan.

Stile di citazione Chicago

Butler, David, e Jennie Freeman. British Political Facts 1900 - 1967. 2nd ed. London: Macmillan, 1968.

Citazione MLA

Butler, David, e Jennie Freeman. British Political Facts 1900 - 1967. 2nd ed. Macmillan, 1968.