Schaefer, H. (1970). Roots of modern design: Functional tradition in the 19th century. Studio Vista.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSchaefer, Hereoin. Roots of Modern Design: Functional Tradition in the 19th Century. London: Studio Vista, 1970.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSchaefer, Hereoin. Roots of Modern Design: Functional Tradition in the 19th Century. Studio Vista, 1970.
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