APA (7th ed.) Citation

United States. Office of Education. (1919). Cold frame. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Office of Education. Cold Frame. Washington: [publisher not identified], 1919.

MLA (9th ed.) Citation

United States. Office of Education. Cold Frame. [publisher not identified], 1919.

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