APA (7th ed.) Citation

United States. Federal Supply Service. (1929). Supplements to general schedule of supplies for fiscal year 1930, for period Jan. 1 to June 30, 1930. GPO.

Chicago Style (17th ed.) Citation

United States. Federal Supply Service. Supplements to General Schedule of Supplies for Fiscal Year 1930, for Period Jan. 1 to June 30, 1930. [Washington]: GPO, 1929.

MLA (9th ed.) Citation

United States. Federal Supply Service. Supplements to General Schedule of Supplies for Fiscal Year 1930, for Period Jan. 1 to June 30, 1930. GPO, 1929.