Greening, P. A. K., & Smith, P. G. (1980). A survey of recreational traffic in the Yorkshire Dales. Access and Mobility Division, Transport and Road Research Laboratory.
Citace podle Chicago (17th ed.)Greening, P. A. K., a P. G. Smith. A Survey of Recreational Traffic in the Yorkshire Dales. Crowthorne, Berk: Access and Mobility Division, Transport and Road Research Laboratory, 1980.
Citace podle MLA (9th ed.)Greening, P. A. K., a P. G. Smith. A Survey of Recreational Traffic in the Yorkshire Dales. Access and Mobility Division, Transport and Road Research Laboratory, 1980.
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