Smith, R. D. H. (1969). Northwestern approaches: The first century of books. Adelphi Book Shop.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSmith, R. D. Hilton. Northwestern Approaches: The First Century of Books. Victoria, B.C.: Adelphi Book Shop, 1969.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSmith, R. D. Hilton. Northwestern Approaches: The First Century of Books. Adelphi Book Shop, 1969.
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