Não informado. (1957). Summary of engineering research. University of Illinois, Engineering Experiment Station.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Summary of Engineering Research. Urbana, Ill: University of Illinois, Engineering Experiment Station, 1957.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Summary of Engineering Research. University of Illinois, Engineering Experiment Station, 1957.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.