APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.