APA (7th ed.) Citation

(1920). How to detect outbreaks of insects and save grain crops. GPO.

Chicago Style (17th ed.) Citation

How to Detect Outbreaks of Insects and Save Grain Crops. [Washington]: GPO, 1920.

MLA (9th ed.) Citation

How to Detect Outbreaks of Insects and Save Grain Crops. GPO, 1920.

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