APA (7th ed.) Citation

Bull, H., Alford, J., & Greenwood, D. (1982). Thinking again about European defence.

Chicago Style (17th ed.) Citation

Bull, Hedley, Jonathan Alford, and David Greenwood. Thinking Again About European Defence. London, 1982.

MLA (9th ed.) Citation

Bull, Hedley, et al. Thinking Again About European Defence. 1982.