APA (7th ed.) Citation

United States. Office of Experiment Stations. (1918). Card index of experiment station literature. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Office of Experiment Stations. Card Index of Experiment Station Literature. Washington: U.S. GPO, 1918.

MLA (9th ed.) Citation

United States. Office of Experiment Stations. Card Index of Experiment Station Literature. U.S. GPO, 1918.

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