United States. Post Office Department & ProQuest (Firm). (1857). Letter from the postmaster general, transmitting a statement of land and water mails established within the year preceding July 1, 1856, &c. [publisher not identified].
Chicago Style (17th ed.) CitationUnited States. Post Office Department and ProQuest (Firm). Letter from the Postmaster General, Transmitting a Statement of Land and Water Mails Established Within the Year Preceding July 1, 1856, &c. Washington: [publisher not identified], 1857.
MLA (9th ed.) CitationUnited States. Post Office Department and ProQuest (Firm). Letter from the Postmaster General, Transmitting a Statement of Land and Water Mails Established Within the Year Preceding July 1, 1856, &c. [publisher not identified], 1857.
Warning: These citations may not always be 100% accurate.