APA način citiranja

Winther, O. O., & Ray Allen Billington. Transportation frontier: Trans-Mississippi west,1865-1890.

Čikaški stil citiranja

Winther, Oscar Osburn, i Ray Allen Billington. Transportation Frontier: Trans-Mississippi West,1865-1890.

MLA način citiranja

Winther, Oscar Osburn, i Ray Allen Billington. Transportation Frontier: Trans-Mississippi West,1865-1890.

Upozorenje: Ovi citati možda nisu uvijek 100% točni.