Hitchcock, H. (1942). In the nature of materials: 1887-1941 : the buildings of Frank LLoyd Wright. New York: Da Capo Press.
Παραπομπή Chicago StyleHitchcock, Henry-Russell. In the Nature of Materials: 1887-1941 : The Buildings of Frank LLoyd Wright. New York: Da Capo Press, 1942.
Παραπομπή MLAHitchcock, Henry-Russell. In the Nature of Materials: 1887-1941 : The Buildings of Frank LLoyd Wright. New York: Da Capo Press, 1942.
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