APA (7 वां संस्करण) प्रशस्ति पत्र

Williams, C. (2013). Origins of form: The shape of natural and man-made things. Architectural Book Pub. Co..

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Williams, Christopher. Origins of Form: The Shape of Natural and Man-made Things. Lanham, Md.: Architectural Book Pub. Co., 2013.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Williams, Christopher. Origins of Form: The Shape of Natural and Man-made Things. Architectural Book Pub. Co., 2013.