Não informado. (1957). Summary of engineering research. University of Illinois, Engineering Experiment Station.
Chicago-viite (17. p.)Não informado. Summary of Engineering Research. Urbana, Ill: University of Illinois, Engineering Experiment Station, 1957.
MLA-viite (8. p.)Não informado. Summary of Engineering Research. University of Illinois, Engineering Experiment Station, 1957.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.