APA (7th ed.) Citation

United States. Department of Agriculture. (1921). Journal of agricultural research, Volume XXI. GPO.

Chicago Style (17th ed.) Citation

United States. Department of Agriculture. Journal of Agricultural Research, Volume XXI. [Washington]: GPO, 1921.

MLA (9th ed.) Citation

United States. Department of Agriculture. Journal of Agricultural Research, Volume XXI. GPO, 1921.

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