Tohutoro APA (7th ed.)
Churella, A. J. (2013). The Pennsylvania Railroad. University of Pennsylvania Press.
Tohutoru Kātū Chicago (17th ed.)
Churella, Albert J. The Pennsylvania Railroad. Philadelphia: University of Pennsylvania Press, 2013.
Tohutoro MLA (9th ed.)
Churella, Albert J. The Pennsylvania Railroad. University of Pennsylvania Press, 2013.
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