APA (7th ed.) Citation

Grigg, A. O., & Huddart, L. (1977). An opinion survey of the Yorkshire Dales rail service in 1977. Transport and Road Research Laboratory.

Chicago Style (17th ed.) Citation

Grigg, A. O., and L. Huddart. An Opinion Survey of the Yorkshire Dales Rail Service in 1977. Crowthorne, Eng: Transport and Road Research Laboratory, 1977.

MLA (9th ed.) Citation

Grigg, A. O., and L. Huddart. An Opinion Survey of the Yorkshire Dales Rail Service in 1977. Transport and Road Research Laboratory, 1977.