APA (7th ed.) Citation

Prior, R. (1983). Churchill's world crisis as history. Helm.

Chicago Style (17th ed.) Citation

Prior, Robin. Churchill's World Crisis as History. London [etc.]: Helm, 1983.

MLA (9th ed.) Citation

Prior, Robin. Churchill's World Crisis as History. Helm, 1983.

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