Não informado. (1909). Structural Engineer. Institution of Structural Engineers.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Structural Engineer. London: Institution of Structural Engineers, 1909.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Structural Engineer. Institution of Structural Engineers, 1909.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.