APA (7th ed.) Citation

Ball, D. (1986). The Pennsylvania Railroad, 1940s-1950s. Elm Tree Books.

Chicago Style (17th ed.) Citation

Ball, Don. The Pennsylvania Railroad, 1940s-1950s. Chester, Vt.: Elm Tree Books, 1986.

MLA (9th ed.) Citation

Ball, Don. The Pennsylvania Railroad, 1940s-1950s. Elm Tree Books, 1986.