United States. General Post Office & Patton, R. Post-Office, Philadelphia, 19th. September, 1796: Establishment of the mails, commencing the 19th. of September, 1796.
Chicago Style (17th ed.) CitationUnited States. General Post Office and Robert Patton. Post-Office, Philadelphia, 19th. September, 1796: Establishment of the Mails, Commencing the 19th. of September, 1796.
MLA (9th ed.) CitationUnited States. General Post Office and Robert Patton. Post-Office, Philadelphia, 19th. September, 1796: Establishment of the Mails, Commencing the 19th. of September, 1796.
Warning: These citations may not always be 100% accurate.