Martin, W., & Pham, C. S. (2015). Estimating the Gravity Model When Zero Trade Flows are Frequent and Economically Determined. World Bank, Washington, DC.
Chicago Style (17th ed.) CitationMartin, Will, and Cong S. Pham. Estimating the Gravity Model When Zero Trade Flows Are Frequent and Economically Determined. World Bank, Washington, DC, 2015.
MLA (8th ed.) CitationMartin, Will, and Cong S. Pham. Estimating the Gravity Model When Zero Trade Flows Are Frequent and Economically Determined. World Bank, Washington, DC, 2015.
Warning: These citations may not always be 100% accurate.