APA (7th ed.) Citation

United States. Congress. House. Committee on Post Office and Post Roads & ProQuest (Firm). (1880). Mail lettings. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Congress. House. Committee on Post Office and Post Roads and ProQuest (Firm). Mail Lettings. Washington: [publisher not identified], 1880.

MLA (9th ed.) Citation

United States. Congress. House. Committee on Post Office and Post Roads and ProQuest (Firm). Mail Lettings. [publisher not identified], 1880.

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