APA (7th ed.) Citation

Berthelon, M., & Freund, C. L. (2004). On the conservation of distance in international trade. World Bank.

Chicago Style (17th ed.) Citation

Berthelon, Matias, and Caroline L. Freund. On the Conservation of Distance in International Trade. Washington, D.C: World Bank, 2004.

MLA (9th ed.) Citation

Berthelon, Matias, and Caroline L. Freund. On the Conservation of Distance in International Trade. World Bank, 2004.