GOLDBERGER, P. (1982). The Skyscraper. Alfred A. Knopf.
Lua i Stíl Chicago (17ú heag.)GOLDBERGER, Paul. The Skyscraper. Alfred A. Knopf, 1982.
Lua MLA (8ú heag.)GOLDBERGER, Paul. The Skyscraper. Alfred A. Knopf, 1982.
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