APA (7th ed.) Citation

United States. Post Office Department & ProQuest (Firm). (1840). Letter from the Postmaster General, transmitting a report of the contracts for carrying the mail for the year ending on the 30th of June, 1839; also, an abstract of the offers for carrying the mail within the said year. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Post Office Department and ProQuest (Firm). Letter from the Postmaster General, Transmitting a Report of the Contracts for Carrying the Mail for the Year Ending on the 30th of June, 1839; Also, an Abstract of the Offers for Carrying the Mail Within the Said Year. Washington: [publisher not identified], 1840.

MLA (9th ed.) Citation

United States. Post Office Department and ProQuest (Firm). Letter from the Postmaster General, Transmitting a Report of the Contracts for Carrying the Mail for the Year Ending on the 30th of June, 1839; Also, an Abstract of the Offers for Carrying the Mail Within the Said Year. [publisher not identified], 1840.