APA (7th ed.) Citation

Witherow, G. A. (1940). Summary of foreign trade of the United States, calendar year 1939. Trade Promotion Series. United States. Bureau of Foreign & Domestic Commerce, 215, 1.

Chicago Style (17th ed.) Citation

Witherow, G. A. "Summary of Foreign Trade of the United States, Calendar Year 1939." Trade Promotion Series. United States. Bureau of Foreign & Domestic Commerce 215 (1940): 1.

MLA (9th ed.) Citation

Witherow, G. A. "Summary of Foreign Trade of the United States, Calendar Year 1939." Trade Promotion Series. United States. Bureau of Foreign & Domestic Commerce, vol. 215, 1940, p. 1.