Schumacher, T. L., & Hodgen, L. (1987). The Vertical surface. Cornell University, Department of Architecture.
Lua i Stíl Chicago (17ú heag.)Schumacher, Thomas L., agus Lee Hodgen. The Vertical Surface. [Ithaca, N.Y.]: Cornell University, Department of Architecture, 1987.
Lua MLA (9ú heag.)Schumacher, Thomas L., agus Lee Hodgen. The Vertical Surface. Cornell University, Department of Architecture, 1987.
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