Smith, C. W. (1948). The early years of the PNLA: Organization, The first decade, Years of growth.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSmith, Charles W. The Early Years of the PNLA: Organization, The First Decade, Years of Growth. [Mercer Island, Wash.], 1948.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSmith, Charles W. The Early Years of the PNLA: Organization, The First Decade, Years of Growth. 1948.
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