Lua APA (7ú heag.)

Não informado. (1909). Structural Engineer. Institution of Structural Engineers.

Lua i Stíl Chicago (17ú heag.)

Não informado. Structural Engineer. London: Institution of Structural Engineers, 1909.

Lua MLA (8ú heag.)

Não informado. Structural Engineer. Institution of Structural Engineers, 1909.

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