Carlson. Electric Interurbans and the American People. Indiana University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCarlson. Electric Interurbans and the American People. Indiana University Press.
एमएलए (9वां संस्करण) प्रशस्ति पत्रCarlson. Electric Interurbans and the American People. Indiana University Press.
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