Não informado. (1930). Civil Engineering. American Society of Civil Engineers.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Civil Engineering. New York: American Society of Civil Engineers, 1930.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Civil Engineering. American Society of Civil Engineers, 1930.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.