APA (7th ed.) Citation

Thornton, A. P. (1963). The imperial idea and its enemies: A study in British power. Macmillan.

Chicago Style (17th ed.) Citation

Thornton, Archibald Paton. The Imperial Idea and Its Enemies: A Study in British Power. London: Macmillan, 1963.

MLA (9th ed.) Citation

Thornton, Archibald Paton. The Imperial Idea and Its Enemies: A Study in British Power. Macmillan, 1963.