Advertisement of October 1, 1873, inviting proposals for carrying the mails of the United States in the states of Oregon, Nevada, and California, and territories of Montana, Wyoming, Colorado, New Mexico, Arizona, Utah, Idaho, and Washington, from July 1, 1874, to June 30, 1878

Chicago citation style
United States. Post Office Dept. Advertisement of October 1, 1873, inviting proposals for carrying the mails of the United States in the states of Oregon, Nevada, and California, and territories of Montana, Wyoming, Colorado, New Mexico, Arizona, Utah, Idaho, and Washington, from July 1, 1874, to June 30, 1878. 1873. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/102288451. (Accessed September 20, 2018.)
APA citation style
United States. Post Office Dept, (1873) Advertisement of October 1, 1873, inviting proposals for carrying the mails of the United States in the states of Oregon, Nevada, and California, and territories of Montana, Wyoming, Colorado, New Mexico, Arizona, Utah, Idaho, and Washington, from July 1, 1874, to June 30, 1878. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/102288451
MLA citation style
United States. Post Office Dept. Retrieved from the Digital Public Library of America <http://catalog.hathitrust.org/Record/102288451>.
Note: These citations are programmatically generated and may be incomplete.