HALL, L. (1971). Secretary And Administrative Practive L. Hall. Macdonald and Evans.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHALL, L. Secretary And Administrative Practive L. Hall. Macdonald and Evans, 1971.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHALL, L. Secretary And Administrative Practive L. Hall. Macdonald and Evans, 1971.
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