Gates, P. W. (1934). The Illinois central railroad and its colonization work. Harvard University Press.
Chicago-referens (17:e uppl.)Gates, Paul Wallace. The Illinois Central Railroad and Its Colonization Work. Cambridge: Harvard University Press, 1934.
MLA-referens (9:e uppl.)Gates, Paul Wallace. The Illinois Central Railroad and Its Colonization Work. Harvard University Press, 1934.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.