APA (7th ed.) Citation

United States. Department of Agriculture. (1930). Black currant spreads white-pine blister rust. GPO.

Chicago Style (17th ed.) Citation

United States. Department of Agriculture. Black Currant Spreads White-pine Blister Rust. [Washington]: GPO, 1930.

MLA (9th ed.) Citation

United States. Department of Agriculture. Black Currant Spreads White-pine Blister Rust. GPO, 1930.

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