APA (7th ed.) Citation

United States. Department of Agriculture. (1939). Index to Crops and markets, Vol. 16, 1939. [s.n.].

Chicago Style (17th ed.) Citation

United States. Department of Agriculture. Index to Crops and Markets, Vol. 16, 1939. [Washington]: [s.n.], 1939.

MLA (9th ed.) Citation

United States. Department of Agriculture. Index to Crops and Markets, Vol. 16, 1939. [s.n.], 1939.