APA (7th ed.) Citation

Barker, E. (1942). British statesmen ([2nd ed.].). William Collins.

Chicago Style (17th ed.) Citation

Barker, Ernest. British Statesmen. [2nd ed.]. London: William Collins, 1942.

MLA (9th ed.) Citation

Barker, Ernest. British Statesmen. [2nd ed.]. William Collins, 1942.