APA (7th ed.) Citation

Williamson, J., & Milner, C. (1991). The world economy: A textbook in international economics. Harvester Wheatsheaf.

Chicago Style (17th ed.) Citation

Williamson, John, and Chris Milner. The World Economy: A Textbook in International Economics. New York [etc.]: Harvester Wheatsheaf, 1991.

MLA (9th ed.) Citation

Williamson, John, and Chris Milner. The World Economy: A Textbook in International Economics. Harvester Wheatsheaf, 1991.