(1955). The nature of cities: Origin, growth, and decline, pattern and form, planning problems. P. Theobald.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रThe Nature of Cities: Origin, Growth, and Decline, Pattern and Form, Planning Problems. Chicago: P. Theobald, 1955.
एमएलए (9वां संस्करण) प्रशस्ति पत्रThe Nature of Cities: Origin, Growth, and Decline, Pattern and Form, Planning Problems. P. Theobald, 1955.
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