Não informado. (1957). Summary of engineering research. University of Illinois, Engineering Experiment Station.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Summary of Engineering Research. Urbana, Ill: University of Illinois, Engineering Experiment Station, 1957.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Summary of Engineering Research. University of Illinois, Engineering Experiment Station, 1957.
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