APA (7th ed.) Citation

United States. Post Office Department. (1928). Statement of postal receipts at 50 industrial offices for month of 1928. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Post Office Department. Statement of Postal Receipts at 50 Industrial Offices for Month of 1928. [Washington]: [publisher not identified], 1928.

MLA (9th ed.) Citation

United States. Post Office Department. Statement of Postal Receipts at 50 Industrial Offices for Month of 1928. [publisher not identified], 1928.