Schawl, R. V. M. (1916). Wise and otherwise: A secret of successful advertising. S.n.].
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSchawl, Robert V. M. Wise and Otherwise: A Secret of Successful Advertising. [S.l.: S.n.], 1916.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSchawl, Robert V. M. Wise and Otherwise: A Secret of Successful Advertising. S.n.], 1916.
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