APA (7th ed.) Citation

United States. Department of the Interior. (1923). Preparation of school grounds for play fields and athletic events. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Department of the Interior. Preparation of School Grounds for Play Fields and Athletic Events. [Washington]: [publisher not identified], 1923.

MLA (9th ed.) Citation

United States. Department of the Interior. Preparation of School Grounds for Play Fields and Athletic Events. [publisher not identified], 1923.

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