Não informado. (1972). Civil engineering technician. Institution of Civil Engineers.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Civil Engineering Technician. London: Institution of Civil Engineers, 1972.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Civil Engineering Technician. Institution of Civil Engineers, 1972.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.