United States. General Post Office & Patton, R. (1797). Post-Office, Philadelphia, 30th. March, 1797: Establishment of the mails, commencing the 3d. of April, 1797. [publisher not identified].
Chicago Style (17th ed.) CitationUnited States. General Post Office and Robert Patton. Post-Office, Philadelphia, 30th. March, 1797: Establishment of the Mails, Commencing the 3d. of April, 1797. [Philadelphia]: [publisher not identified], 1797.
MLA (9th ed.) CitationUnited States. General Post Office and Robert Patton. Post-Office, Philadelphia, 30th. March, 1797: Establishment of the Mails, Commencing the 3d. of April, 1797. [publisher not identified], 1797.
Warning: These citations may not always be 100% accurate.