APA (7th ed.) Citation

United States. Office of Education. (1918). Keeping at it. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Office of Education. Keeping at It. Washington: [publisher not identified], 1918.

MLA (9th ed.) Citation

United States. Office of Education. Keeping at It. [publisher not identified], 1918.

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