APA (7th ed.) Citation

(1931). General schedule of supplies for fiscal year 1931, 1st supplement of awards to class 18: Item 18605, typewriting machines, for period from July 1, 1930, to June 30, 1931. [publisher not identified].

Chicago Style (17th ed.) Citation

General Schedule of Supplies for Fiscal Year 1931, 1st Supplement of Awards to Class 18: Item 18605, Typewriting Machines, for Period from July 1, 1930, to June 30, 1931. Washington, D.C.: [publisher not identified], 1931.

MLA (9th ed.) Citation

General Schedule of Supplies for Fiscal Year 1931, 1st Supplement of Awards to Class 18: Item 18605, Typewriting Machines, for Period from July 1, 1930, to June 30, 1931. [publisher not identified], 1931.