Ostrander, G. M. (1970). American civilization in the first machine age: 1890-1940. Harper & Row.
Lua i Stíl Chicago (17ú heag.)Ostrander, Gilman Marston. American Civilization in the First Machine Age: 1890-1940. New York: Harper & Row, 1970.
Lua MLA (9ú heag.)Ostrander, Gilman Marston. American Civilization in the First Machine Age: 1890-1940. Harper & Row, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.