APA aipamena

Ball, D. (1980). America's railroads: The second generation. New York: Norton.

Chicago Style aipamena

Ball, Don. America's Railroads: The Second Generation. New York: Norton, 1980.

MLA aipamena

Ball, Don. America's Railroads: The Second Generation. New York: Norton, 1980.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.