APA (7th ed.) Citation

Knox, P. L., & Agnew, J. (1989). The geography of the world economy. E. Arnold.

Chicago Style (17th ed.) Citation

Knox, Paul L., and John Agnew. The Geography of the World Economy. London: E. Arnold, 1989.

MLA (9th ed.) Citation

Knox, Paul L., and John Agnew. The Geography of the World Economy. E. Arnold, 1989.