APA (7th ed.) Citation

United States. Post Office Department. (1928). Appendix to Cost ascertainment report for fiscal year 1929. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Post Office Department. Appendix to Cost Ascertainment Report for Fiscal Year 1929. [Washington]: [publisher not identified], 1928.

MLA (9th ed.) Citation

United States. Post Office Department. Appendix to Cost Ascertainment Report for Fiscal Year 1929. [publisher not identified], 1928.