APA (7th ed.) Citation

Barker, E. (1978). Churchill and Eden at war / (by) Elisabeth Barker. Macmillan.

Chicago Style (17th ed.) Citation

Barker, Elisabeth. Churchill and Eden at War / (by) Elisabeth Barker. London (etc.): Macmillan, 1978.

MLA (9th ed.) Citation

Barker, Elisabeth. Churchill and Eden at War / (by) Elisabeth Barker. Macmillan, 1978.

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