APA (7th ed.) Citation

United States. War Department. (1920). Regulations No. 7, Joint Committee on Printing; amendment to Circular No. 549, War Department, 1919. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. War Department. Regulations No. 7, Joint Committee on Printing; Amendment to Circular No. 549, War Department, 1919. Washington: [publisher not identified], 1920.

MLA (9th ed.) Citation

United States. War Department. Regulations No. 7, Joint Committee on Printing; Amendment to Circular No. 549, War Department, 1919. [publisher not identified], 1920.