APA (7th ed.) Citation

United States. Federal Supply Service. (1917). General schedule of supplies for fiscal year 1918, supplement to class 6: Electrical, engineering, and plumbing supplies. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Federal Supply Service. General Schedule of Supplies for Fiscal Year 1918, Supplement to Class 6: Electrical, Engineering, and Plumbing Supplies. [Washington]: [publisher not identified], 1917.

MLA (9th ed.) Citation

United States. Federal Supply Service. General Schedule of Supplies for Fiscal Year 1918, Supplement to Class 6: Electrical, Engineering, and Plumbing Supplies. [publisher not identified], 1917.