Maps.com (Firm) & ebrary, Inc. (2000). Expansion of railroads to 1860. Maps.com.
Style de citation Chicago (17e éd.)Maps.com (Firm) et Inc ebrary. Expansion of Railroads to 1860. [S.l.]: Maps.com, 2000.
Style de citation MLA (9e éd.)Maps.com (Firm) et Inc ebrary. Expansion of Railroads to 1860. Maps.com, 2000.
Attention : ces citations peuvent ne pas être correctes à 100%.