APA (7th ed.) Citation

United States. Federal Supply Service. (1927). Supplements to general schedule of supplies for fiscal year 1928, for period Jan. 1 to June 30, 1928. GPO.

Chicago Style (17th ed.) Citation

United States. Federal Supply Service. Supplements to General Schedule of Supplies for Fiscal Year 1928, for Period Jan. 1 to June 30, 1928. [Washington]: GPO, 1927.

MLA (9th ed.) Citation

United States. Federal Supply Service. Supplements to General Schedule of Supplies for Fiscal Year 1928, for Period Jan. 1 to June 30, 1928. GPO, 1927.