APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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

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