Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.