Ohio Society of Surveyors and Civil Engineers. Annual report of the Ohio Society of Surveyors and Civil Engineers. Hann & Adair.
Chicago-referens (17:e uppl.)Ohio Society of Surveyors and Civil Engineers. Annual Report of the Ohio Society of Surveyors and Civil Engineers. Columbus: Hann & Adair.
MLA-referens (8:e uppl.)Ohio Society of Surveyors and Civil Engineers. Annual Report of the Ohio Society of Surveyors and Civil Engineers. Hann & Adair.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.