Berry, B. J. L., & Abiodun, J. O. (1970). Geographic perspectives on urban systems: With integrated readings. N.J., Prentice-Hall.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBerry, Brian Joe Lobley, और Josephine Olu;Berry Abiodun. Geographic Perspectives on Urban Systems: With Integrated Readings. N.J., Prentice-Hall, 1970.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBerry, Brian Joe Lobley, और Josephine Olu;Berry Abiodun. Geographic Perspectives on Urban Systems: With Integrated Readings. N.J., Prentice-Hall, 1970.
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