APA (7th ed.) Citation

United States. Post Office Department & ProQuest (Firm). (1912). Post Office Department Annual Reports. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Post Office Department and ProQuest (Firm). Post Office Department Annual Reports. Washington: [publisher not identified], 1912.

MLA (9th ed.) Citation

United States. Post Office Department and ProQuest (Firm). Post Office Department Annual Reports. [publisher not identified], 1912.

Warning: These citations may not always be 100% accurate.