Worthen, W. E. (1869). A practical treatise on architectural drawing and design. D. Appleton.
Lua i Stíl Chicago (17ú heag.)Worthen, William E. A Practical Treatise on Architectural Drawing and Design. New York: D. Appleton, 1869.
Lua MLA (8ú heag.)Worthen, William E. A Practical Treatise on Architectural Drawing and Design. D. Appleton, 1869.
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