Não informado. (1911). Engineering Experiment Station bulletin. Ohio Engineering Experiment Station.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Engineering Experiment Station Bulletin. Columbus, Ohio: Ohio Engineering Experiment Station, 1911.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Engineering Experiment Station Bulletin. Ohio Engineering Experiment Station, 1911.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.