United States. Congress. House. Committee on Post Office and Post Roads & ProQuest (Firm). (1882). The Leavitt letter-canceling and post-marking machine. [publisher not identified].
Chicago Style (17th ed.) CitationUnited States. Congress. House. Committee on Post Office and Post Roads and ProQuest (Firm). The Leavitt Letter-canceling and Post-marking Machine. Washington: [publisher not identified], 1882.
MLA (9th ed.) CitationUnited States. Congress. House. Committee on Post Office and Post Roads and ProQuest (Firm). The Leavitt Letter-canceling and Post-marking Machine. [publisher not identified], 1882.
Warning: These citations may not always be 100% accurate.