APA (7th ed.) Citation

Williams, A., & Percival, D. Steam locomotives: [by] Alan Williams and David Percival. I. Allan [c1964].

Chicago Style (17th ed.) Citation

Williams, Alan, and David Percival. Steam Locomotives: [by] Alan Williams and David Percival. London: I. Allan [c1964].

MLA (9th ed.) Citation

Williams, Alan, and David Percival. Steam Locomotives: [by] Alan Williams and David Percival. I. Allan [c1964].