Walker, R. A. (1950). The planning function in urban government (2nd ed.). The University of Chicago Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWalker, Robert Averill. The Planning Function in Urban Government. 2nd ed. Chicago: The University of Chicago Press, 1950.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWalker, Robert Averill. The Planning Function in Urban Government. 2nd ed. The University of Chicago Press, 1950.
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