Grigg, A. O., & Huddart, L. (1977). An opinion survey of the Yorkshire Dales rail service in 1977. Transport and Road Research Laboratory.
Citace podle Chicago (17th ed.)Grigg, A. O., a L. Huddart. An Opinion Survey of the Yorkshire Dales Rail Service in 1977. Crowthorne, Eng: Transport and Road Research Laboratory, 1977.
Citace podle MLA (9th ed.)Grigg, A. O., a L. Huddart. An Opinion Survey of the Yorkshire Dales Rail Service in 1977. Transport and Road Research Laboratory, 1977.
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