Speck, J. (2012). Walkable city: How downtown can save america, one step at a time.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSpeck, Jeff. Walkable City: How Downtown Can Save America, One Step at a Time. 2012.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSpeck, Jeff. Walkable City: How Downtown Can Save America, One Step at a Time. 2012.
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