Cita APA (7th ed.)
Mac Gill, C. E. (1917). History of Transportation in the United States before 1860.
Cita Chicago (17th ed.)
Mac Gill, Caroline Elizabeth. History of Transportation in the United States Before 1860. Washington, 1917.
Cita MLA (9th ed.)
Mac Gill, Caroline Elizabeth. History of Transportation in the United States Before 1860. 1917.
Atenció: Aquestes cites poden no estar 100% correctes.