APA (7th ed.) Citation

Cohen, R., Westbrook, R., & Cohen, R. (2000). Conclusion: The Beginnings of International Relations.

Chicago Style (17th ed.) Citation

Cohen, Raymond, Raymond Westbrook, and R. Cohen. Conclusion: The Beginnings of International Relations. 2000.

MLA (8th ed.) Citation

Cohen, Raymond, et al. Conclusion: The Beginnings of International Relations. 2000.