APA (7th ed.) Citation

Barraclough, G. (1967). An introduction to contemporary history. Penguin.

Chicago Style (17th ed.) Citation

Barraclough, Geoffrey. An Introduction to Contemporary History. Harmondsworth: Penguin, 1967.

MLA (8th ed.) Citation

Barraclough, Geoffrey. An Introduction to Contemporary History. Penguin, 1967.

Warning: These citations may not always be 100% accurate.