John, R. R. (1995). Spreading the news: The American postal system from Franklin to Morse. Harvard University Press.
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Chicago-čujuhus (17. p.)
John, Richard R. Spreading the News: The American Postal System from Franklin to Morse. Cambridge, MA: Harvard University Press, 1995.
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MLA-čujuhus (9. p.)
John, Richard R. Spreading the News: The American Postal System from Franklin to Morse. Harvard University Press, 1995.
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