Fogel, R. W. (1960). The Union Pacific Railroad: A case in premature enterprise. John Hopkins Press.
Cita Chicago (17th ed.)Fogel, Robert William. The Union Pacific Railroad: A Case in Premature Enterprise. Baltimore: John Hopkins Press, 1960.
Cita MLA (9th ed.)Fogel, Robert William. The Union Pacific Railroad: A Case in Premature Enterprise. John Hopkins Press, 1960.
Atenció: Aquestes cites poden no estar 100% correctes.