United States. Postmaster General. (1868). List of post offices and postmasters in U.S., with appendix containing names of post offices arranged by States and counties, and table of distances from Washington, D.C. to county seats of the several States and territories, et cetera; also money-order offices, rates of postage, and other postal information, revised and corrected by Post Office Department to Oct. 20, 1867. U.S. Government Printing Office.
Chicago Style (17th ed.) CitationUnited States. Postmaster General. List of Post Offices and Postmasters in U.S., with Appendix Containing Names of Post Offices Arranged by States and Counties, and Table of Distances from Washington, D.C. to County Seats of the Several States and Territories, Et Cetera; Also Money-order Offices, Rates of Postage, and Other Postal Information, Revised and Corrected by Post Office Department to Oct. 20, 1867. [Place of publication not identified]: U.S. Government Printing Office, 1868.
MLA (9th ed.) CitationUnited States. Postmaster General. List of Post Offices and Postmasters in U.S., with Appendix Containing Names of Post Offices Arranged by States and Counties, and Table of Distances from Washington, D.C. to County Seats of the Several States and Territories, Et Cetera; Also Money-order Offices, Rates of Postage, and Other Postal Information, Revised and Corrected by Post Office Department to Oct. 20, 1867. U.S. Government Printing Office, 1868.