APA (7th ed.) Citation

Bridge, F. R., & Bullen, R. (1980). The great powers and the European states system: 1815 - 1914. Longman.

Chicago Style (17th ed.) Citation

Bridge, Francis R., and Roger Bullen. The Great Powers and the European States System: 1815 - 1914. London: Longman, 1980.

MLA (8th ed.) Citation

Bridge, Francis R., and Roger Bullen. The Great Powers and the European States System: 1815 - 1914. Longman, 1980.