APA (7th ed.) Citation

Helble, M., & Okubo, T. (2012). Heterogeneous Quality Firms and Trade Costs. World Bank, Washington, DC.

Chicago Style (17th ed.) Citation

Helble, Matthias, and Toshihiro Okubo. Heterogeneous Quality Firms and Trade Costs. World Bank, Washington, DC, 2012.

MLA (8th ed.) Citation

Helble, Matthias, and Toshihiro Okubo. Heterogeneous Quality Firms and Trade Costs. World Bank, Washington, DC, 2012.

Warning: These citations may not always be 100% accurate.