Various. Transactions of the American Society of Civil Engineers, vol. LXVIII, Sept. 1910, Start/End Papers The New York Tunnel Extension of the Pennsylvania Railroad.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रVarious. Transactions of the American Society of Civil Engineers, Vol. LXVIII, Sept. 1910, Start/End Papers The New York Tunnel Extension of the Pennsylvania Railroad.
एमएलए (9वां संस्करण) प्रशस्ति पत्रVarious. Transactions of the American Society of Civil Engineers, Vol. LXVIII, Sept. 1910, Start/End Papers The New York Tunnel Extension of the Pennsylvania Railroad.
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